The cumulative probability is
P(at most 2 ) = 0.187560896 [answer]
How to solvea)
Note that the probability of x successes out of n trials is
P(n, x) = nCx p^x (1 - p)^(n - x)
where
n = number of trials = 12
p = the probability of a success = 0.33
x = the number of successes = 3
Thus, the probability is
P ( 3 ) = 0.21509867 [answer]
***********
b)
Note that P(at least x) = 1 - P(at most x - 1).
Using a cumulative binomial distribution table or technology, matching
n = number of trials = 12
p = the probability of a success = 0.33
x = our critical value of successes = 4
Then the cumulative probability of P(at most x - 1) from a table/technology is
P(at most 3 ) = 0.402659566
Thus, the probability of at least 4 successes is
P(at least 4 ) = 0.597340434 [answer]
***************
c)
Using a cumulative binomial distribution table or technology, matching
n = number of trials = 12
p = the probability of a success = 0.33
x = the maximum number of successes = 2
Then the cumulative probability is
P(at most 2 ) = 0.187560896 [answer]
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Use the frequency data in the table below to compute the phi correlation coefficient.
Therapist's Approach Satisfaction Totals
Cognitive-Behavioral Psychodynamic
Client Satisfied
by Therapy?
Yes 26 15 41
No 11 24 35
Approach Totals 37 39 N = 76
What is the Fobt for the regression line?
What is the critical value (Fcrit ) for the significance test of the regression line?
Based on the Fobt you calculated is the regression line statistically significant? (i.e., Should you reject the null hypothesis?)
Use the information you computed for the regression line significant test's source table to calculate the standard error of prediction (se). What is its value? (Round your answer to 2 decimal places)
Based on the information, we cannot reject the null hypothesis because our calculated phi coefficient (0.245) is smaller than the critical value (3.84).
How to explain the hypothesisIt should be noted that to establish whether the phi coefficient is statistically significant, we can compare it to a crucial value. However, the significance level (i.e., alpha) must be specified ahead of time.
Assume a 0.05 level of significance. We calculate the crucial value for a 2x2 contingency table with 1 degree of freedom and a significance level of 0.05 using a phi coefficient table or calculator.
We cannot reject the null hypothesis because our calculated phi coefficient (0.245) is smaller than the critical value (3.84). As a result, we find that there is no statistically significant relationship between the therapist's method and client satisfaction.
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Please help, due tonight!
The area of the trapezoid with parallel sides of 8 meters and 7 meters, and a height of 4 meters, is 30 square meters.
To find the area of a trapezoid, we use the formula:
Area = (a + b)h/2
where "a" and "b" are the lengths of the parallel sides of the trapezoid, and "h" is the height of the trapezoid.
In this case, we are given that the parallel sides are 8 meters and 7 meters, and the height is 4 meters.
Substituting these values into the formula, we get:
Area = (8 + 7) x 4 / 2
= 15 x 4 / 2
= 60 / 2
= 30 square meters
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Just Need the blanks filled in PLEASE HELP
The Equation based on the function will be: t = (1/0.07) * ln(P/1,500,000)
How to explain the functionInitially, the exponential expression is extracted and formulated as follows:
It should be noted that to obtain e^(0.07t) = P/1,500,000
Secondly, in order to determine the value of t, take the natural logarithm of both sides of the equation such that:
Take ln(e^(0.07t)) = ln(P/1500000)
It can now be represented by 0.07t = ln(P/1500000)
Finally, on dividing both components of the term through 0.07, it results in the isolation of t where:
Equation: t = (1/0.07) * ln(P/1,500,000)
In conclusion, this function's inverse describes the number of years, since the year 1990, for a determined population figure, P - its formation being previously outlined above.
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please help me thank you!!
Answer: 75%
Step-by-step explanation:
We will divide the wanted outcome by the total number of possible outcomes. Note that a decimal times 100 becomes a percentage.
[tex]\displaystyle \frac{\text{not picking a diamond card}}{\text{cards in the deck}} =\frac{39}{\text{52}} =0.75\;\;\;0.75*100=75\%[/tex]
You're trying to save to buy a new $160,000 Ferrari. You have $58,000 today that can be invested at your bank. The bank pays 6 percent annual interest on its accounts. How many years will it be before you have enough to buy the car? Assume the price of the car remains constant. explain
You need 9 years to buy the car.
Given that, you need to $160,000, you have $58,000, the bank pays 6 % annual interest on its accounts. we need to find the number of years will it be before you have enough to buy the car,
A = P(1+r)ᵇ
102000 = 58000(1+0.06)ᵇ
1.75 = 1.06ᵇ
log 1.75 = b log 1.06
b = 9.6
Hence, you need 9 years to buy the car.
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Celia bought 40 lbs of clay for her art projects. She used 17.4 lbs to make a sculpture, and 1.01 lbs for each mug. How many mugs did Celia make if she had 7.45 lbs of clay left over?
The requried, Celia made 15 mugs if she had 7.45 lbs of clay left over.
To determine the number of mugs that Celia made, we need to first subtract the weight of the sculpture and the leftover clay from the initial weight of the clay. This will give us the total weight of clay that Celia used for the mugs:
Total weight of clay used for mugs = 40 lbs - 17.4 lbs - 7.45 lbs = 15.29 lbs
Next, we can divide the total weight of clay used for the mugs by the amount of clay used per mug:
Number of mugs = Total weight of clay used for mugs / Amount of clay used per mug
Amount of clay used per mug = 1.01 lbs/mug
A number of mugs = 15.29 lbs / 1.01 lbs/mug = 15.13
Therefore, Celia made 15 mugs.
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3 A line passes through the point (-8, 9) and has a slope of 3/4
Write an equation in slope-intercept form for this line.
Answer:
y = 3/4x + 15
Step-by-step explanation:
Given;
A line passes through the point (-8, 9) and has a slope of 3/4
Question:
Write an equation in slope-intercept form for this line.
Solve:
Slope-intercept form ⇒ y=mx+b
Which-
m = Slopeb = y-intercepty and x = any point on the lineBased on the given;
m = 3/4b = ?y = 9x = -8Using slope intercept form to find y-intercept;
y=mx+b
9 = 3/4(-8) + b
9 = -6 + b
9+6 = -6+6 + b
b = 15
Therefore now we can write an equation.
y = 3/4x + 15
RevyBreeze
What is an angle that is adjacent to
Answer:
<HAG
Step-by-step explanation:
Two angles are adjacent when they have a common side and common vertex, and they do not overlap one another. In this case, <EAG, A is the vertex. <HAG has the same vertex, A, and it shares side AG.
Question attached. You dont need to send working out just and answer to 2dp
The value of length of AG is,
AG = 157.02
We have to given that;
AD = 31 cm
DC = 22 cm
Hence, We get;
AC = √31² + 22²
AC = √961 + 484
AC = √1445
AC = 38
Thus, We get;
cos 76° = AC / AG
0.242 = 38 / AG
AG = 38/0.242
AG = 157.02
Therefore, The value of length of AG is,
AG = 157.02
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A flashlight can light a circular area of up to 6 feet in diameter. What is the maximum area that can be lit? Round to the nearest tenth if needed!
Answer: 28.3
Step-by-step explanation:
The question is just asking for the area of a circle with a diameter of 6. The equation for that is [tex]A = \pi r^{2[/tex].
Since the Radius (r) is half the diameter, your equation will look like this: [tex]A=\pi 3^2[/tex].
When plugged into a calculator, 28.27443 is the answer. Rounded to the nearest tenth would be 28.3. Hope this helps!
You will purchase 700 frozen treat's the cost to you should be at most 400 your goal is to make a profit of at least $800. Explain to Omar how your decision meets each of the criteria. Include the number of each type of treat in your explanation
The decision meets each of the criteria by: Buying 500 popsicles at $0.50 each and 200 ice cream sandwiches at $1.50 each enables the purchase of 700 frozen delights within the $400 budget and satisfies the objective of producing at least $800 in profit.
How did your decision meets each of the criteria?I have made the decision to buy 500 popsicles at $0.50 each and 200 ice cream sandwiches at $1.50 each in order to fulfil the requirement of buying 700 frozen delights at a price of no more than $400.
Cost of purchasing 500 popsicles = (500 * $0.50)
Cost of purchasing 500 popsicles = $250
Cost of purchasing 200 ice cream sandwiches =(200 * $1.50)
Cost of purchasing 200 ice cream sandwiches = $300
So, Total cost of purchasing all 700 frozen treats is $550 ($250 + $300) which is within the budget of $400.
I intend to sell the popsicles for $1.50 each and the ice cream sandwiches for $3.00 each in order to meet the requirement of turning a profit of at least $800. This would bring in $1350 in income for the ice cream sandwiches and $750 for the popsicles (500 * $1.50 and 200 * $3.00 respectively).
The objective of producing a profit of at least $800 is met after deducting the expense of buying the frozen treats from the overall income.
Net profit =($1350 - $550)
Net profit = $800
Therefore purchasing 500 popsicles at $0.50 each and 200 ice cream sandwiches at $1.50 each satisfies the objective of producing at least $800 in profit.
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simplify -6 times the square root 7 X 4 times the square root 5
Answer:
-24√35
Step-by-step explanation:
Mark Brainliest!!
What is 200,000,000 divided by 100,000
the answer to your math problem is 2000
When working for a District Attorney, an investigator analyzed the leading digits of the amounts from 784 checks issued by seven suspect insurance companies. The frequencies were found to be 0, 12, 0, 73, 482, 186, 8, 23, and 0, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's Law, the check amounts appear to result from fraud. Use a 0.05 significance level to test for goodness-of-fit with Benford's Law. What is the value of the test statistic? Does it appear that the checks are the result of fraud?
Using chi-squared goodness-of-fit test with Benford's Law, observed check frequencies were found to be significantly different, indicating possible fraud. The test statistic was 756.153, exceeding the critical value of 15.51.
Using chi-squared goodness-of-fit test with Benford's Law, observed check frequencies were found to be significantly different, indicating possible fraud. The test statistic was 756.153, exceeding the critical value of 15.51.
To test for goodness-of-fit with Benford's Law, we can use the chi-squared goodness-of-fit test. The null hypothesis is that the observed frequencies follow Benford's Law, while the alternative hypothesis is that they do not.
We can start by calculating the expected frequencies for each leading digit based on Benford's Law. According to Benford's Law, the expected proportion of leading digits is
P(d) = log10(1 + 1/d), where d is the leading digit (1, 2, ..., 9).
Then, we can calculate the expected frequencies by multiplying the proportion by the sample size
Expected frequency for digit d = P(d) * sample size.
Using this formula, we can calculate the expected frequencies for each digit
Expected frequencies: 3.542, 2.019, 1.518, 1.221, 1.028, 0.886, 0.778, 0.697, and 0.643.
We can use these expected frequencies and the observed frequencies to calculate the chi-squared statistic
chi-squared = Σ (observed frequency - expected frequency)² / expected frequency
We can then compare this value to the chi-squared distribution with 8 degrees of freedom (since there are 9 digits and one constraint, which is that the frequencies must add up to the sample size). Using a significance level of 0.05 and a chi-squared distribution table or calculator, the critical value is 15.51.
Plugging in the observed and expected frequencies, we get
chi-squared = (0 - 3.542)²/3.542 + (12 - 2.019)²/2.019 + (0 - 1.518)²/1.518 + (73 - 1.221)²/1.221 + (482 - 1.028)²/1.028 + (186 - 0.886)²/0.886 + (8 - 0.778)²/0.778 + (23 - 0.697)²/0.697 + (0 - 0.643)²/0.643
chi-squared = 756.153
Since the calculated chi-squared statistic (756.153) is greater than the critical value (15.51), we reject the null hypothesis and conclude that the observed frequencies are not consistent with Benford's Law. This suggests that the check amounts are the result of fraud.
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determine the number and type of solutions
2x²-7x-30=0
The equation 2x² - 7x - 30 = 0 has two solutions: x = -5/2 and x = 6 and both solutions are real.
What is the number and type of solutions of the quadratic equation?Given the equation in the question:
2x² - 7x - 30 = 0
We can use the quadratic formula to to determine the number and type of solutions :
x = (-b±√(b² - 4ac)) / (2a)
2x² - 7x - 30 = 0
a = 2
b = -7
c = -30
Plugging in these values, we get:
x = (-b±√(b² - 4ac)) / (2a)
x = (-(-7) ± √((-7)² - ( 4 × 2 × -30))) / (2×2)
x = (7 ± √( 49 - ( -240))) / (4)
x = (7 ± √( 49 + 240)) / (4)
x = (7 ± √( 289)) / (4)
x = (7 ± 17) / 4
x = (7 - 17) / 4 and x = (7 + 17) / 4
x = -5/2 and x = 6
Therefore, the two solutions are x = -5/2 and x = 6.
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Solve for x.
Trigonometry
explain how you got your answer please
The value of x in the triangle is 12.285.
We have,
We use cosine identities.
So,
Cos Ф = Base / Hypotenuse
Now,
Cos 35= x/15
0.819 = x/15
x = 0.819 x 15
x = 12.285
Thus,
The value of x is 12.285.
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what expression is not equivalent to 2/3 x 4
Answer:
there are no choices given but...
Step-by-step explanation:
this simplifies to 8/3, or 2 2/3
find the choice that isn't either of those ( is also 2.66666 repeating)
Mark is running in a 13-mile race.He has run 5miles so far
The required Mark has completed 38.46% of the race.
To calculate the percentage of the race completed by Mark, we can divide the number of miles he has run by the total length of the race and then multiply by 100 to convert the result to a percentage.
So, Mark has run 5 miles out of a total of 13 miles:
Percentage of race completed = (5/13) x 100%
Calculating this expression, we get:
Percentage of race completed = 38.46%
Therefore, Mark has completed 38.46% of the race.
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i nedddddddd help on thisssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
What meaning of the statement this?
This statement defines the concept of left and right sets of elements x of G with respect to the subgroup H of G.
How does the statement express it's meaning?The left set of x in G, denoted by xH, is the set of all elements of G obtained by multiplying x to the left by all elements of H. Formally xH = {xh: h ∈ H}, where "xh" denotes the product of x and h in G.
Similarly, the right-hand set of x in G, denoted Hx, is the set of all elements of G obtained by multiplying x on the right by all elements of H. Formally Hx = {hx: h ∈ H}, where "hx" denotes the product of h and x in G.
Generally, left and right sets are different sets and may contain different numbers of elements. However, if the group G is commutative (ie the order of multiplication does not matter), then the left and right sets are equal.
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HELP ASAP I NEED THIS Use the image to determine the direction and angle of rotation.
90° clockwise rotation
180° clockwise rotation
180° counterclockwise rotation
90° counterclockwise rotation
Answer:
90 degrees counterclockwise
Find the surface area of the composite solid. Round your answer to the nearest hundredth.
The surface area is about square centimeters.
WILL GIVE BRAINLIEST
The surface area of the composite figure is about 98.56 sq.cm
What is the surface area of the composite figure?The composite figure is made up of a cylinder and a cuboid.
The formula for surface area of a cylinder is:
A = 2πr² + 2πrh
In this case, we only have top and not bottom. Thus:
A = πr² + 2πrh
A = π(1)² + 2π(1 * 6)
A = 37.7 sq.cm
Surface area of cuboid is:
A = 2(4 * 4) + 4(2 * 4) - π(1)²
A = 32 + 32 - π
A = 60.86 sq.cm
Total surface area = 37.7 sq.cm + 60.86 sq.cm
= 98.56 sq.cm
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A cylinder has a base radius of 6ft and a height of 18ft. What is its volume in cubic ft, to the nearest tenths place?
Answer:
2035.8 ft³
Step-by-step explanation:
You want to know the volume of a cylinder with radius 6 ft and height 18 ft.
VolumeThe volume of a cylinder is given by the formula ...
V = πr²h
For the given dimensions, the volume is ...
V = π(6 ft)²(18 ft) ≈ 2035.8 ft³
The volume of the cylinder is about 2035.8 cubic feet.
__
Additional comment
If you use 3.14 for π, you get 2034.7 cubic feet.
<95141404393>
What are the coordinates of the image of the point (8,1) after a dilation by a scale factor of 2 with the origin as the center of dilation, followed by a translation over the y-axis
The point after a dilation by a scale factor of 2 with the origin as the center of dilation, and a translation over the y-axis is (-16, 2).
Given is a point, (8, 1) we need to find the coordinates of a point which is dilated from the origin by the scale factor of 2 and translation over the y-axis,
So, the coordinates of after dilation by k scale factor =
(x, y) = (kx, ky)
So, (8, 1) = (16, 2)
Now, the translation over the y-axis gives,
(x, y) = (-x, y)
Therefore, (16, 2) = (-16, 2)
Hence, the point after a dilation by a scale factor of 2 with the origin as the center of dilation, and a translation over the y-axis is (-16, 2).
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what is the surface area of the capsule ? round your answer to the nearest hundredth
I'm sorry, but I cannot answer this question without additional information about the dimensions of the capsule. Please provide me with the necessary information so that I can assist you.
a square room has a floor area of 25 square feet. the height of the room is 6 feet. what is the area of all 4 walls
Answer:
100
Step-by-step explanation:
the room is square this means each wall equal 25 .4 walls *25 =100 square feet
Answer:120
Step-by-step explanation:
In 2012, the population of a city was 6.53 million. The exponential growth rate was 2.79% per year. a) Find the exponential growth function. b) Estimate the population of the city in 2018. c) When will the population of the city be 10 million? d) Find the doubling time.
a) The exponential growth function for a city's population that was 6.53 million in 2012 with an exponential growth rate of 2.79% per year is y = 6.53(1.0279)^t.
b) Based on the exponential growth function y = 6.53(1.0279)^t the population of the city in 2018 is 7.7 million.
c) The population of the city will be 10 million in 2028.
d) The doubling time for the population is 25 years.
What is an exponential growth function?An exponential growth function is one of the two exponential functions, including an exponential decay function.
An exponential growth function shows the relationship between two variables with an exponent and exhibits a constant rate of growth per period.
Population of the city in 2012 = 6.53million
Exponential growth rate = 2.79% per year
Let the number of growth years = t
Exponential growth function:a) y = 6.53(1.0279)^t
b) From 2012 to 2018, the number of years = 6 years
Population in 2018, y = 6.53(1.0279)^6
= 7.7 million
c) When the population will be 10 million = 15.5 years
10 = 6.53(1.0279)t
t = 15.5 years
= 16 years
= 2028
d) 13.06 = 6.53(1.0279)t
t = 25.189 years
= 25 years
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QUESTION SIX Solve the following problems: (a) Find the gradient, x and y intercepts of 3x + 4y + 12 = 0. Sketch the graph. (6 Marks) (b) Find the gradient, x and y intercepts of the line I, passing through the points P (-1,4) and Q (3,0). Sketch the graph. (6 Marks) (c) A line 1₂ is perpendicular to 4. Find its gradient. (2 Marks) (14 Marks)
The sketches of the graphs are added as an attachment and the gradient of the perpendicular line l₂ is 1
Finding the gradient, x and y interceptsGiven that
3x + 4y + 12 = 0
Set x = 0 to determine the y-intercept
4y + 12 = 0
So, we have
y-intercept = -3
Set y = 0 to determine the x-intercept
3x + 12 = 0
So, we have
x-intercept = -4
For the gradient, we make y the subject in 3x + 4y + 12 = 0.
y = -3/4x - 12/4
y = -3/4x - 3
So, the gradient is -3/4
The sketch of the graph is attached.
Finding the gradient, x and y interceptsHere, we have the points P (-1,4) and Q (3,0).
The gradient is
gradient = (0 - 4)/(3 + 1)
gradient = -1
From the point, we have
x-intercept = 3
For the y-intercept, we have
(0 - 4)/(3 + 1) = (y - 4)/(0 + 1)
(y - 4)/(0 + 1) = -1
y - 4 = -1
y-intercept = 3
So, the equation is
y = -x + 3
The sketch of the graph is attached.
Finding the gradient of l₂We understand that l₂ is perpendicular to l
The gradients of perpendicular lines are
Gradient 1 = -1/Gradient 2
So, we have
l₂ = -1/-1
Evaluate
l₂ = 1
Hence, the gradient of line l₂ is 1
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(+25)-5x5:2+2²
27-5×5=2+2²
Answer:
16.5 = 6
Step-by-step explanation:
The equation given is (+25)-5x5:2+2² = 27-5×5=2+2². When calculating, we first simplify the division to get (+25)-12.5+4 = 27-25+4. Then we add and subtract the values on either side to get 16.5 = 6. Finally, as the equation is incorrect, we can conclude that the initial assertion is false. It is important to carefully follow the order of operations and simplify expressions correctly to avoid errors in equations.
Hurry pls
50pts
Time limit
Tell me the domain and range
Tell me whether the graph is a function or not.
The answer choices are below
Examining the graph, it can be deduced that the graph is not a function.
the domain is x ≥ -3the range is all real numbersWhat is domain and range?Domain and range are mathematical notation utilized to define the spectrum of possible accepted input values (domain) as well as the corresponding output values (range) in a given function or relation.
A definitive domain correspondingly denotes the compilations of all plausible inputs that generate a valid result when put essentially into the relation or operation.
Conversely, the range defines the plethora of conceivable outputs that this very same function or relation can devise, considering its specified domain.
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