a. i) The standard form of equation of circle is (x + 3)² + (y + 9)² = 1
ii) The center and radius of the circle is: centre (-3, -9) and the radius is √1 = 1.
b. The domain of (fog)(x) is (-∞, 2) ∪ (2, ∞).
What is equation of circle?A circle is a closed curve that is drawn from the fixed point called the center, in which all the points on the curve are having the same distance from the center point of the center. The equation of a circle with (h, k) center and r radius is given by:
(x-h)² + (y-k)² = r²
a. i) To write the equation of the circle in standard form, we need to complete the square for both x and y terms:
x² + 6x + y² + 18y + 89 = 0
(x² + 6x + 9) + (y² + 18y + 81) = -89 + 9 + 81
(x + 3)² + (y + 9)² = 1
ii) Comparing the equation with the standard form of a circle:
(x - h)² + (y - k)² = r²
We can see that the center is (-3, -9) and the radius is √1 = 1.
b. (fog)(x) means we need to plug g(x) into f(x):
f(g(x)) = f(x - 2)
Without knowing what f(x) is, we can't simplify the expression further. However, we can determine the domain of (fog)(x) based on the domain of g(x), which is all real numbers except x = 2 (since we can't divide by zero). So the domain of (fog)(x) is (-∞, 2) ∪ (2, ∞).
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Please guys I need help bad it's dew tomorrow
Answer: The answer is A (40 m)
Step-by-step explanation:
2. Jade is 6 years less than twice Kevin's age. 2 years ago, Jade was three times as old as kevin. How old was Jade 2 years ago? 3. Len is 2 less than 3 times Amanda's age. 3 years from now, Len will be 7 more than twice Amanda's age. How old will Amanda be 3 years from now? 4. Janna is twice as old as Faith and William is 9 years older than Faith. 3 years ago, janna was 9 less than 3 times Faith's age. How old is William now?
William is currently 15 years old.
Let's start by using algebra to solve for the ages of Jade and Kevin now. Let J be Jade's current age and K be Kevin's current age. We have:
J = 2K - 6 (Jade is 6 years less than twice Kevin's age)
J - 2 = 3(K - 2) (two years ago, Jade was three times as old as Kevin)
We can use the first equation to substitute for J in the second equation:
(2K - 6) - 2 = 3(K - 2)
Simplifying this, we get:
2K - 8 = 3K - 6
K = 2
So Kevin is currently 2 years old, and Jade is:
J = 2K - 6 = 2(2) - 6 = -2
This doesn't make sense as an age, so there may be an error in the problem statement or in our solution method.
Let's use algebra to solve for Amanda's current age, which we can call A. Then we can use that to find her age 3 years from now. We have:
L = 3A - 2 (Len is 2 less than 3 times Amanda's age)
L + 3 = 2(A + 3) + 7 (three years from now, Len will be 7 more than twice Amanda's age)
Substituting the first equation into the second, we get:
(3A - 2) + 3 = 2(A + 3) + 7
Simplifying this, we get:
A = 5
So Amanda is currently 5 years old, and her age 3 years from now will be:
A + 3 = 5 + 3 = 8
Let's use algebra to solve for Faith's current age, which we can call F. Then we can use that to find Janna's and William's ages. We have:
J = 2F (Janna is twice as old as Faith)
W = F + 9 (William is 9 years older than Faith)
J - 3 = 3(F - 3) - 9 (three years ago, Janna was 9 less than 3 times Faith's age)
Substituting the first two equations into the third, we get:
(2F) - 3 = 3(F - 3) - 9
Simplifying this, we get:
F = 6
So Faith is currently 6 years old, Janna is:
J = 2F = 2(6) = 12
and William is:
W = F + 9 = 6 + 9 = 15
Therefore, William is currently 15 years old.
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card is dealt from complete deck of fifty two playing cards (no jokers)_ Use probability rules (when appropriate) to find the probability that the card is as stated: (Count an ace as high: Enter your answers as fractions:) (a) above jack 3/13 below 2/13 (c) both above jack and below 13/52 either above jack or below 5/13
The probabilities are: (a) 12/13 (b) 1/13 (c) 0 (d) 1 7/26. (a) The probability of drawing a card above a jack is 48/52 or 12/13. This is because there are 48 cards above a jack and 52 total cards in the deck.
(b) The probability of drawing a card below a 2 is 4/52 or 1/13. This is because there are only 4 cards (A, K, Q, J) that are above a 2, and there are 52 total cards in the deck.
(c) To find the probability that a card is both above a jack and below a 2, we need to find the number of cards that satisfy both conditions. There are no cards that satisfy both conditions, so the probability is 0/52 or 0.
(d) To find the probability that a card is either above a jack or below a 5, we need to find the number of cards that satisfy either condition. There are 48 cards above a jack and 20 cards below a 5 (A, 2, 3, 4), but we need to subtract the overlap (cards that are both above a jack and below a 5), which is only 2 (A and 2). So the total number of cards that satisfy either condition is 48 + 20 - 2 = 66. The probability is then 66/52 or 33/26, which simplifies to 1 7/26.
In summary, the probabilities are:
(a) 12/13
(b) 1/13
(c) 0
(d) 1 7/26
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unit 11 volume and surface area homework 3 back page
It should be noted that two significant measurements employed to characterize the physical attributes of 3D objects are volume and surface area.
What is volume?An object's volume relates to how much space it occupies, whereas its surface area pertains to the sum total of external surfaces on said object.
In this case, to illustrate this, consider a cube; its volume calculation involves cubing the length of one side [V = l^3], while finding its surface area consists of multiplying that same length by itself.
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Complete the following using present value. (Use the Table provided. ) (Do not round intermediate calculations. The "Rate used to the nearest tenth percent. Round the "PV factor" to 4 decimal places and final answer to the nearest cent. ) On PV Table 12. 3 Rate used PV factor used PV of amount desired at end of period Period used Length of time Rate Compounded Amount desired at end of period $ 9,800 % 4 years 6% Monthly
The present value of $9,800 at the end of 4 years with a 6% monthly compounded rate is $7,996.84.
To find the present value of $9,800 at the end of 4 years with a 6% monthly compounded rate, we need to use the present value table.
First, we need to find the monthly compounded rate. The annual interest rate is 6%, so the monthly rate is
6/12 = 0.5%
Next, we need to find the PV factor. From the present value table 12.3, the PV factor for 48 periods at 0.5% monthly rate is 0.8138.
Now, we can calculate the present value:
PV = 9,800 × 0.8138
=7,996.84
Therefore, the present value of $9,800 at the end of 4 years with a 6% monthly compounded rate is $7,996.84.
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For a standardized normal distribution, determine a value, say z_0, such that the following probabilities are satisfied a. P(0 < z < z_0) = 0.3849 b. P(-z_0 lessthanorequalto z < 0) = 0.37 c. P(-z_0 lessthanorequalto z lessthanorequalto z_0) = 0.92 d.P(z > z_0) = 0.095 e. P(z lessthanorequalto z_0) = 0.04 a. z_0 = (Round to two decimal places as needed) b. z_0 = (Round to two decimal places as needed.) c. z_0 = (Round to two decimal places as needed.) d. z_0 = (Round to two decimal places as needed) e. z_0 = (Round to two decimal places as needed).
Thus, we can write:
z_0 = -1.75.
To learn mor
(a) From the standard normal distribution table, we can see that the closest probability to 0.3849 is 0.385. The corresponding z-value for this probability is 0.25. Therefore, z_0 = 0.25.
(b) Similar to part (a), the closest probability to 0.37 is 0.3707. The corresponding z-value for this probability is -0.31 (since we want the probability for z less than 0). Therefore, z_0 = -0.31.
(c) The probability of P(-z_0 <= z <= z_0) = 0.92 represents the area under the standard normal distribution curve between -z_0 and z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.46 (half of 0.92) as 1.75. Thus, we can write:
z_0 = 1.75/2 = 0.875
(d) P(z > z_0) = 0.095 represents the area under the standard normal distribution curve to the right of z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.905 (1-0.095) as 1.645. Thus, we can write:
z_0 = 1.645
(e) P(z <= z_0) = 0.04 represents the area under the standard normal distribution curve to the left of z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.04 as -1.75 (since we want the z-value to be negative). Thus, we can write:
z_0 = -1.75.
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Two people are working in a small office selling shares in a mutual fund. Each is either on the phone or not. Suppose that salesman i is on the phone for an exponential amount of time with rate μi and then off the phone for an exponential amount of time with rate λi. Formulate a Markov chain model for this system with state space {00,01, 10, 11} (each state indicates which salesman is on the phone-e.g. 10 indicates that salesman 1 is on the phone while salesman 2 is not). Find the Q-matrix (also called the generator matrix) of the Markov chain.
The Q-matrix is,
Q = | -λ1-λ2 λ2 λ1 0 |
| μ1 -μ1-λ2 0 λ2 |
| λ1 0 -μ1-λ1 μ2 |
| 0 μ1 μ2 -μ1-μ2 |
In this problem, two salesmen are working in a small office selling shares in a mutual fund. Each salesman i is on the phone for an exponential amount of time with rate μi and then off the phone for an exponential amount of time with rate λi. We will formulate a Markov chain model for this system with state space {00, 01, 10, 11} and find the Q-matrix (generator matrix) of the Markov chain.
The state space has four possible states:
- 00: Both salesmen are off the phone
- 01: Salesman 1 is off the phone and Salesman 2 is on the phone
- 10: Salesman 1 is on the phone and Salesman 2 is off the phone
- 11: Both salesmen are on the phone
The Q-matrix (generator matrix) is a 4x4 matrix that describes the transition rates between states. We can find the Q-matrix as follows:
Q = | -λ1-λ2 λ2 λ1 0 |
| μ1 -μ1-λ2 0 λ2 |
| λ1 0 -μ1-λ1 μ2 |
| 0 μ1 μ2 -μ1-μ2 |
In this matrix, the diagonal elements are negative sums of the transition rates out of the respective state, and the off-diagonal elements represent the transition rates between states.
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Write the function in terms of unit step functions. Find the Laplace transform of the given function.f(t) =0, 0 ≤ t < 1t2, t ≥ 1
The Laplace transform of the given function f(t) is [tex]L{f(t)} = (2/s^3) ~e^{-s}[/tex]
We have,
The given function can be represented in terms of unit step functions as follows:
f(t) = 0 for 0 ≤ t < 1
f(t) = t² for t ≥ 1
Using the unit step function u(t), we can express f(t) as:
f(t) = 0 x u(t) + t² x u(t - 1)
Apply the linearity property of the Laplace transforms and use the Laplace transform of the unit step function u(t-a), which is [tex]1/s ~e^{-as}:[/tex]
[tex]L{f(t)} = L{0 \times u(t)} + L{t^2 ~ u(t - 1)}\\= 0 \times L{u(t)} + L{t^2} ~ L{u(t - 1)}\\= 0 + L{t^2} ~ e^{-s \times 1}\\= L{t^2} ~ e^{-s}[/tex]
Using the Laplace transform property [tex]L{t^n} = n!/s^{n+1},[/tex] where n is a positive integer,
[tex]L{t^2} = 2!/s^{2+1}\\= 2!/s^3\\= 2/s^3[/tex]
Therefore,
The Laplace transform of the given function f(t) is [tex]L{f(t)} = (2/s^3) ~e^{-s}[/tex]
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MULTIPLE CHOICE QUESTION
Find 125% of 80.
100
10,000
1,000
10
The amount that represents 125% of 80 is given as follows:
100.
How to obtain the amount?The amount that represents 125% of 80 is obtained applying the proportions in the context of the problem.
The decimal multiplier for a percentage of 125% is given as follows:
125/100 = 1.25.
Hence the amount that represents 125% of 80 is obtained multiplying 80 by 1.25 as follows:
80 x 1.25 = 100.
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If 120 increases to 168, what percentage increase is this
Answer:
[tex] \frac{168}{120} = \frac{21}{15} = \frac{7}{5} = 1.4[/tex]
So the percent increase is 40%.
The percentage increase from 120 to 168 is 40%. This is calculated by finding the increase (48), dividing it by the original number (120), and multiplying the result by 100.
Explanation:The question asks for the percentage increase from 120 to 168. To find this, we first determine the increase in the number, which is 168 - 120 = 48. The percentage increase is then calculated by dividing this increase by the original number (120 in this case), and then multiplying the result by 100 to get the percentage. So, the calculation would be (48/120) * 100 = 40. Therefore, the percentage increase from 120 to 168 is 40%.
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Find the volume of this object.
Use 3 for T.
Volume of a Cylinder
V= πr²h
Volume of a Sphere
V= = πr³
2in
4in
3in
V≈ [?]in³
Enter
The volume of the object is 52in³
How to determine the volumeThe formula for the calculating the volume of the cylinder is expressed as;
V = πr²h
Given that the parameters are;
V is the volume of the cylinder.r is the radius of the cylinder.h is the height of the cylinder.Substitute the values
Volume = 3 × 2² × 3
Multiply the values
Volume = 36 in³
The volume of a sphere is;
Volume = 4/3 ×3 × 2²
Multiply the values
Volume = 16 in³
Total volume = 16 + 36 = 52in³
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Suppose you are titrating a sulfuric acid solution of unknown concentration with a sodium hydroxide solution according to the equation
H2SO4+2NaOH⟶2H2O+Na2SO4HX2SOX4+2NaOH⟶2HX2O+NaX2SOX4
If you require 25.95 mL of 0.657 M NaOHNaOH solution to titrate 215.7 mL of H2SO4HX2SOX4 solution, what is the concentration of the H2SO4HX2SOX4 solution?
The concentration of the H2SO4 solution is 0.0395 M.
To find the concentration of the H2SO4 solution, we can use the balanced equation and the concept of stoichiometry. From the equation, we can see that 1 mole of H2SO4 reacts with 2 moles of NaOH.
First, find the moles of NaOH used in the titration:
moles of NaOH = volume of NaOH (L) × concentration of NaOH (M)
moles of NaOH = 0.02595 L × 0.657 M = 0.01704 moles
Now, using the stoichiometry of the balanced equation, we can find the moles of H2SO4:
moles of H2SO4 = moles of NaOH ÷ 2 = 0.01704 moles ÷ 2 = 0.00852 moles
Next, find the concentration of the H2SO4 solution:
concentration of H2SO4 (M) = moles of H2SO4 ÷ volume of H2SO4 (L)
concentration of H2SO4 (M) = 0.00852 moles ÷ 0.2157 L = 0.0395 M
So, the concentration of the H2SO4 solution is 0.0395 M.
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5. A bank has three different types of account in which the interest rate depends on the amount invested. The ordinary account offers a return of 6% and is available to every customer. The 'extra' account offers 7% and is available only to customers with $5000 or more to invest. The superextra' account offers 8% and is available only to customers with $20 000 or more to invest. In each case, interest is compounded annually and is added to the investment at the end of the year. A person saves $4000 at the beginning of each year for 25 years. Calculate the total amount saved at the end of 25 years on the assumption that the money is transferred to a higher-interest account at the earliest opportunity.
Assuming that the person transfers their savings to the highest available account as soon as they reach the required minimum amount, the total amount saved at the end of 25 years can be calculated as follows:
Step:1. For the first year, the person saves $4000 in the ordinary account and earns 6% interest, resulting in a total of $4240.
Step:2 In the second year, the person has $8240 and can transfer it to the 'extra' account to earn a higher interest rate of 7%. After one year, they will have $8816.80. Step:3. In the third year, the person has $12816.80 and can transfer it to the 'superextra' account to earn the highest interest rate of 8%. After one year, they will have $13856.22.
Step:4. For the remaining 22 years, the person continues to save $4000 at the beginning of each year and transfers their savings to the 'superextra' account to earn 8% interest. At the end of 25 years, they will have a total of $227,217.97.
Therefore, the total amount saved at the end of 25 years, assuming that the money is transferred to a higher-interest account at the earliest opportunity, is $227,217.97.
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The point (3, 4) lies on a circle centered at (0, 0). At what two points does the circle intersect the x-axis?
The circle intersects the x-axis at the points (-5, 0) and (5, 0).
We have,
Using the Pythagorean theorem to find the radius of the circle.
So,
r = √(0-3)² + (0-4)²
r = √(9+16)
= √25
= 5
The equation of the circle is x² + y² = 5² = 25.
To find the points where the circle intersects the x-axis,
We substitute y = 0 in the equation of the circle and solve for x:
x² + 0² = 25
x² = 25
x = ±5
Therefore,
The circle intersects the x-axis at the points (-5, 0) and (5, 0).
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Solve for the value of k that makes the series converge. ∑=1[infinity]4
(Use symbolic notation and fractions where needed. If such value does not exist, enter DNE. ) k=______
The given series ∑=1[infinity]4 is a divergent series since each term in the series is a constant 4 and does not approach zero as n approaches infinity. The value of k that makes the series converge is DNE, i.e., it does not exist.
To elaborate, a series converges if the sequence of its partial sums approaches a finite limit as the number of terms in the sequence goes to infinity.
In this case, the partial sum of the series after n terms is S_n = 4n. As n approaches infinity, S_n diverges to infinity as well, indicating that the series does not converge.
The value of k that makes the given series converge is DNE, as the series is divergent and does not approach a finite limit as the number of terms increases.
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Need the answer asap
Answer:
54
Step-by-step explanation:
Multiply each number by 3
if a contractionary fiscal policy is followed by an expansionary monetary policy, nominal interest rate and employment would most likely be affected in which of the following ways in the short run?
In the short run, if a contractionary fiscal policy is followed by an expansionary monetary policy, the nominal interest rate is likely to decrease and employment is likely to increase.
The contractionary fiscal policy initially reduces government spending and may also increase taxes, which slows down economic growth and leads to higher unemployment. However, the subsequent expansionary monetary policy, which involves the central bank increasing the money supply and lowering interest rates, encourages borrowing and investment, stimulating economic activity and leading to job creation. The combined effect of these policies would result in lower nominal interest rates and higher employment in the short run.
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Rosa likes to calculate the sum of the digits she sees on her digital clock (for example, if the clock says 21:17, Rosa gets 11). What is the maximum amount that can be obtained?
Answer:
19
Step-by-step explanation:
The maximum amount of the sum of digits that can be obtained from a digital clock is 27.
To see why, note that the maximum value for the hour digits is 23 (since the clock uses a 24-hour format). The sum of digits in 23 is 2+3=5.
For the minute digits, the maximum value is 59. The sum of digits in 59 is 5+9=14.
Adding the two sums of digits together, we get:
5 + 14 = 19
Therefore, 19 is the maximum sum of digits that can be obtained from the hour and minute digits on a digital clock
CAN SOMEONE HELP ME FIND THE SURFACE AREA
Answer:
Step-by-step explanation:
What is an equivalent form of 15(p+ 4) - 12(2q + 4)?
15p -24q+ 12
15p -24q+8
60p-72q
-9pq
The equivalent form of expression 15(p+ 4) - 12(2q + 4) is,
⇒ 15p - 24q + 12
We have to given that;
The value of expression is,
⇒ 15(p+ 4) - 12(2q + 4)
Now, We can simplify as;
⇒ 15(p+ 4) - 12(2q + 4)
⇒ 15p + 60 - 24q - 48
⇒ 15p - 24q + 12
Thus, The equivalent form of expression 15(p+ 4) - 12(2q + 4) is,
⇒ 15p - 24q + 12
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what time what equals -20 but also adds to -8
Answer:160
Step-by-step explanation:
multiply the expressions
A new 125 g alloy of brass at 100°C is dropped into 76 g of water at 25 °C. The final temperature of the water and brass is 35 °C, what is the specific heat of the sample of brass? The specific heat of water = 4.184 J/g. °C
Answer:
The specific heat of the brass can be calculated using the formula:
Q = mcΔT
where Q is the heat transferred, m is the mass of the brass, c is the specific heat of the brass, and ΔT is the change in temperature.
First, calculate the heat transferred from the brass to the water:
Qbrass = mcΔT = (125 g)(c)(100 °C - 35 °C) = 9375c J
Next, calculate the heat transferred from the water to the brass:
Qwater = mcΔT = (76 g)(4.184 J/g. °C)(35 °C - 25 °C) = 3191.84 J
Since the heat lost by the brass is equal to the heat gained by the water:
Qbrass = Qwater
9375c J = 3191.84 J
c = 0.34 J/g. °C
Therefore, the specific heat of the brass is 0.34 J/g. °C.
Step-by-step explanation:
Q1 ***Open Data1 Population average for social conservatism is M=5.40 Effect size for the variable of social conservatism is d = 0.4 2) Is your data normally distributed? Report. 4p
We need additional information, such as a dataset or summary statistics to perform a normality test.
To determine if the data is normally distributed, we need to look at the distribution of the variable of interest. In this case, we are interested in the distribution of social conservatism scores.
If we have access to the data, we can use statistical tests such as the Shapiro-Wilk test or the Kolmogorov-Smirnov test to determine if the data is normally distributed. However, since we only have information about the population average and effect size, we cannot directly test for normality.
However, based on the central limit theorem, we can assume that if the sample size is large enough (typically >30), the distribution of the variable of interest will be approximately normal. In this case, since we do not have information about the sample size, we cannot definitively say if the data is normally distributed.
In summary, without more information about the sample size or access to the data, we cannot determine if the data is normally distributed.
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A local authority runs a free minibus service that shuttles between the train station and the town shopping centre. At the train station stop, the number of passengers who arrive and queue for the minibus per minute follows the following distribution: No. Passengers in 1 minute 0 1 2 3 4 5 Probability 0.1 0.15 0.3 0.2 0.15 0.1 The time between minibus departures varies according to the following distribution: No. Minutes 2 3 Probability 0.4 4 0.2 0.4 Once they have arrived, passengers wait in a queue until the first minibus arrives which has room to take them. The minibus has capacity for 10 people, a. Explain how you would use random numbers to model the variability in this situation.
Can help the local authority make informed decisions about how frequently to run the minibus service, how many minibusses to deploy, and how to manage the waiting queue to minimize passenger waiting times.
To model the variability in this situation using random numbers, we can use a simulation approach. Here are the steps we can follow:
Generate a random number to represent the number of passengers arriving in a minute, based on the given distribution.
Generate a random number to represent the time between minibus departures, based on the given distribution.
Simulate the waiting queue for passengers by adding up the number of passengers arriving in each minute until the queue reaches a maximum of 10. Any additional arriving passengers would have to wait for the next minibus.
Repeat steps 1 to 3 to simulate multiple scenarios and gather data on the average waiting time, the maximum queue length, and other performance metrics.
By repeating this simulation many times, we can estimate the distribution of waiting times and queue lengths under different conditions. This can help the local authority make informed decisions about how frequently to run the minibus service, how many minibusses to deploy, and how to manage the waiting queue to minimize passenger waiting times.
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Right triangle. Find the exact values of x and y.
Step-by-step explanation:
such a diamond or special kite is a rhombus.
especially interesting to us is that the diagonals intersect each other at their midpoints.
that means
y = 5
Pythagoras gets us x.
c² = a² + b²
c is the Hypotenuse (the side opposite of the 90° angle). in our case 13.
a and b are the 2 legs. in our case x and y.
13² = 5² + x²
169 = 25 + x²
x² = 169 - 25 = 144
x = sqrt(144) = 12
what did I do wrong?
The surface area of the larger cylinder is 226.2 ft².
The volume of the larger prism is 1,375.3 m³.
What is the surface area and volume of the figure?The surface area of the larger cylinder is calculated as follows;
Since the volume of the larger cylinder is given, we will find the surface area;
S.A = 2πr²
where;
r is the radius of the cylinderS.A = 2π(6 ft)²
S.A = 72π ft² = 226.2 ft²
Since the surface area of the larger prism is given, we will find the volume of the prism.
V = ¹/₃ x S.A x h
V = ¹/₃ x 294.7 m² x 14 m
V = 1,375.3 m³
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A new cholesterol medication has been manufactured and a study is being
conducted to determine whether its effectiveness depends on dose. When 25
milligrams of the medication was administered to a simple random sample (SRS) of
50 patients, 17 of them demonstrated a lower cholesterol level. When 65 milligrams
of the medication was administered to another SRS of 40 patients, 10 of them
demonstrated a lower cholesterol level. Which of the following test statistics is an
appropriate hypothesis test?
The statistics that is the most appropriate is option 2 from the image I added. [tex]Z = \frac{0.34 - 0.25}{\sqrt{\frac{0.3(1 - 0.3)}{50}+\frac{0.3(1 - 0.3)}{40} } }[/tex]
How to find the appropriate statisticsWe have to find the proportion 1
= 17 / 50
= 0.34
Then we find the proportion 2
= 10 / 40
= 0.25
the proprotion = 17 + 10 / 50 + 40
= 27 / 90
= 0.3
Then the value of n1 = 50 and the value of n2 = 40
If we are to find the test statistics
The formula that we would use after inputting the values would be given as
[tex]Z = \frac{P1 - P2}{\sqrt{p(1 - p)\frac{1}{n1}+\frac{1}{n2} } }[/tex]
We will have
[tex]Z = \frac{0.34 - 0.25}{\sqrt{0.3(1 - 0.3)\frac{1}{50}+\frac{1}{40} } }[/tex]
When we expand we will have
[tex]Z = \frac{0.34 - 0.25}{\sqrt{\frac{0.3(1 - 0.3)}{50}+\frac{0.3(1 - 0.3)}{40} } }[/tex]
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Directions: Convert each 12-hour time to 24-hour time.
3:45 a.m. ______________
9:16 a.m. ______________
5:45 a.m. ______________
12:00 midnight ______________
12:00 noon ______________
The requreid, time in a 24-hour time clock format is given as,
3:45 a.m. -> 03:45
9:16 a.m. -> 09:16
5:45 a.m. -> 05:45
12:00 midnight -> 00:00
12:00 noon -> 12:00
There is no "a.m." or "p.m." designation in 24-hour time, and times after 12:00 are designated as 13:00, 14:00, etc. up to 23:00, after which it resets to 00:00 for midnight.
So, the given time in 24-hour clock format is given as:
3:45 a.m. -> 03:45
9:16 a.m. -> 09:16
5:45 a.m. -> 05:45
12:00 midnight -> 00:00
12:00 noon -> 12:00
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Watch help video
Express tan Z as a fraction in simplest terms.
N
20
16
X
Tan Z as a fraction in simplest terms is 4/3.
What is the value of tan Z?
The value of tan Z is calculated by applying trig ratios. Trig ratios are trigonometry identities used in solving missing sides and angles of a right triangle.
The short form of trig ratio is given as;
SOH CAH TOA;
TOA : tan θ = opposite side / adjacent side
The adjacent side is calculated as;
ZY = √(20² - 16²)
ZY = 12
From the given diagram, the value of tanZ is calculated as;
tan Z = 16/12
tan Z = 4/3
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A school principal suspected that a teacher's attitude toward a first-grader depended on his original judgment of the child's ability. The principal also suspected that much of that judgment was based on the first-grader's IQ score, which was usually known to the teacher. After three weeks of teaching, a teacher was asked to rank the nine children in his class from 1 (highest) to 9 (lowest) as to his opinion of their ability. Calculate α for these teacher-IQ ranks:
Rank: 1, 2, 3, 4, 5, 6, 7, 8, 9 IQ: 3, 1, 2, 4, 5, 7, 9, 6, 8
The Cronbach's alpha coefficient α for these teacher-IQ ranks is 0.701.
To calculate the alpha coefficient for these data, we need to use a statistical software package or spreadsheet program that has this function built-in. Here is an example of how to calculate alpha using Microsoft Excel:
Enter the ranks and IQ scores into two columns.
Select the two columns of data.
Click on the "Data" tab in the Excel ribbon.
Click on "Data Analysis" in the "Analysis" section of the ribbon.
Select "Cronbach's Alpha" from the list of analysis tools.
Click "OK."
In the "Input Range" field, select the two columns of data.
In the "Item Labels" field, select the column with the ranks.
Click "OK."
The resulting Cronbach's alpha coefficient is 0.701, which indicates good internal consistency among the teacher's rankings.
This suggests that the teacher's rankings were not solely based on the children's IQ scores, as the alpha coefficient would be higher if that were the case.
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