The height of the rock is described by the quadratic equation:
h = -16t² + 79t + 50.
a. The rock will be 125 feet above the beach for approximately 3.66 and 1.28 seconds.
b. The rock will reach its maximum height in about 2.5 seconds, reaching a height of around 147.5 feet.
A quadratic equation is what?An equation of the form f(x) = ax² + bx + c, where a 0 and a, b, and c are numbers, is a quadratic equation.
a. The following is how the rocket's height function is presented:
h(t) = -16·t² + 79·t + 50
The time at which the height is 125 feet is as follows:
h(t) = 125 feet
h(t) = 125 = -16·t² + 79·t + 50
-16·t² + 79·t + 50 - 125 = 125 - 125 = 0
-16·t² + 79·t - 75 = 0
The quadratic formula indicates:
t = (-79 ± √(79² - 4 × (-16) ×(-75)))/(2 × (-16)) = (79 ± √(1441))/32
t = (79 ± √(1441))/32
t = (79 + √(1441))/32 ≈ 3.66
t = (79 - √(1441))/32 ≈ 1.28
Therefore, the times at which the height of the rock is 125 feet above the beach are t ≈ 3.66 seconds, and t ≈ 1.28 seconds.
b.The formula for determining the input value at the maximum value of a quadratic function, which is: at the maximum height, x = -b/2a, can be used to determine the time at which the rock is at the maximum height.
Consequently, we obtain at the highest height;
t = -79/(2 (-16)) = 2.46875 is the time.
The rock climbs to its highest point in 2.46875 seconds, or 2.5 seconds.
Hence, h (2.46875) = -162.46875² + 792.46875 + 50 = 147.515625 147.5 is the maximum height.
The rock can rise up to a height of approximately 147.5 feet.
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What is the common difference in the arithmetic sequence 10, 8, 6, 4, ...?
1/2
-1/2
-2
2
Answer:
The common difference in an arithmetic sequence is the constant difference between any two consecutive terms. In this sequence, the difference between each pair of consecutive terms is -2, so the common difference is -2.
Therefore, the answer is -2.
Sanjay attempts a 49-yard field goal in a football game. For his attempt to be a success, the football needs to pass through the uprights and over the crossbar that is 10 feet above the ground.
Sanjay kicks the ball from the ground with an initial velocity of 73 feet per second, at an angle of 34° with the horizontal.
What is true of Sanjay's attempt?
Responses
The kick is not successful. The ball is approximately 5 feet too low.
The kick is not successful. The ball is approximately 8 feet too low.
The kick is not successful. The ball is approximately 2 feet too low
The kick is good! The football clears the crossbar by approximately 5 feet.
In the above prompt involving a trajectory calculation, the correct option is: "The kick is not successful. The ball is approximately 5 feet too low." (Option A)
What is the rationale for the above response?x component of trajectory = 73 cos 34 f/s
Now how long will it take to travel 49 yards (= 147 feet) ?
147 / (73 cos 34) = 2.43 seconds
Initial y component of trajectory = 73 sin 34 f/s = 40.82 f/s
but this velocity is acted upon by gravity
y = y0 + vot - 1/2 a t^2
y0 = 0
Now we need to know the y value at 2.43 seconds to see if it will clear the uprights.
y = 40.82 (2.43) - 1/2 (32.174)(2.43)2
= 4.2 Feet
Thus, it is correct to state that the "The kick is not successful. The ball is approximately 5 feet too low."
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A five-pound bag of potatoes costs $2.95 in a particular store. What is the unit price of the potatoes per ounce?
Therefore, the unit price of the potatoes per ounce is $0.036875.
What is unitary method?The unitary method is a mathematical technique that involves finding a single unit value in order to solve a problem involving multiple units. In other words, the unitary method involves finding the value of one unit of a given quantity, and then using that value to calculate the value of another quantity that is related to it.
Here,
First, we need to convert pounds to ounces since the unit price is usually measured in terms of ounces. There are 16 ounces in one pound, so:
5 pounds = 5 x 16
= 80 ounces
The bag of potatoes costs $2.95 for 80 ounces, so the unit price per ounce can be found by dividing the total cost by the number of ounces:
Unit price per ounce = Total cost / Number of ounces
Unit price per ounce = $2.95 / 80
= $0.036875
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If 0 equal( Picture)
Answer:
[tex]\sin(\theta) = -\dfrac{\sqrt2}{2}[/tex]
[tex]\cos(\theta) = -\dfrac{\sqrt2}{2}[/tex]
Step-by-step explanation:
The sine of any given angle on the unit circle is the y-coordinate of the point on the circle at the given angle.
The cosine of any given angle on the unit circle is the x-coordinate of the point on the circle at the given angle.
See the attached image for a labeled unit circle.
The point on the unit circle that is at angle 5π/4 is:
[tex]\left(-\dfrac{\sqrt2}{2},-\dfrac{\sqrt2}{2}\right)[/tex]
This means that:
[tex]\sin\left(\dfrac{5\pi}{4}\right) = \cos\left(\dfrac{5\pi}{4}\right) = \boxed{-\dfrac{\sqrt2}{2}}[/tex]
Point G' has coordinates (-5, 2). If it was reflected across the y-axis, what were the coordinates of its pre-image?
(-5, -2)
(5, 2)
(2, -5)
(5, -2)
Answer: Second answer, (5,2)
Step-by-step explanation:
To reflect across the y axis, it would be: (x,y) -> (-x,y)
So, (-5,2) reflected across the y axis would be (5,2)
(b). A competitive market has the demand schedule p=420-2q and the supply schedule p= 60+ 4q where p is measured in naira. (i) Find the equilibrium values of p and q. (ii) What will happen to these values if the government imposes a tax of N24 per unit on q?
1. The equilibrium quantity = 60, the equilibrium price = 300
2. If the government imposes the tax of 24, the quantity supplies would fall to 56, and the price would rise to 308
How to solve for equilibriumAt equilibrium we have P = Q
that is price is equal to quantity. Such that we would have:
420-2q = 60+ 4q
take the like terms
420 - 60 = 4q + 2q
360 = 6q
q = 360 / 6
q = 60
The equilibrium quantity = 60 then equilibrium price =
420-2q
420 - 2 * 60
300
The equilibrium price is 300
2. If the government imposes 24 dollar per unit
420-2q = 60+ 4q + 24
420 - 2q = 84 + 4q
420 - 84 = 4q + 2q
336 = 6q
56 = q
420-2 * 56
p = 308
If the government imposes the tax of 24, the quantity supplies would fall to 56, and the price would rise to 308
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Use what you learned from analyzing the electricity bill to answer this question.
11. Using information from the electricity bill, explain the importance of budgeting electricity
into monthly finances. How would you create a plan to adjust your monthly budget as bills
fluctuate month by month?
Answer: Budgeting for electricity is important because it allows you to plan and allocate your financial resources in a way that ensures that you can pay your electricity bills on time and avoid late payment fees, disconnection, or debt accumulation. Electricity bills can fluctuate significantly from month to month, depending on factors such as the weather, the number of people living in your home, your electricity usage patterns, and changes in electricity rates.
To create a plan to adjust your monthly budget as bills fluctuate month by month, you can take the following steps:
- Review your past electricity bills to identify patterns and trends in your usage and costs. Look for any changes that may have occurred, such as the addition of new appliances, a change in occupancy, or a change in electricity rates.
- Use this information to estimate your average monthly electricity costs. This will be your baseline budget.
- Consider setting aside a buffer amount, such as 10-15%, to account for unexpected changes or fluctuations in your electricity bills.
- Monitor your electricity bills closely each month to compare your actual costs with your budgeted amount. If your bills are consistently higher or lower than your budgeted amount, adjust your budget accordingly for the following month.
- Look for ways to reduce your electricity usage and costs, such as turning off lights and appliances when not in use, using energy-efficient light bulbs and appliances, and adjusting your thermostat settings.
- Consider enrolling in a budget billing or level payment plan offered by your electricity provider, which allows you to pay the same amount each month based on your estimated annual usage.
By budgeting for electricity and adjusting your budget as bills fluctuate month by month, you can better manage your finances, avoid surprises, and ensure that you can pay your bills on time.
Step-by-step explanation:
solve the system of equations graphed on the coordinate axes below
The solution to the system of equations on the graph is (0, 0)
How to determine the solution to the systemFrom the question, we have the following parameters that can be used in our computation:
y = -2x and y = 4/3x represented on a graph
On the graph, we have two lines that intersect at a point
Using the above as a guide, we have the following:
The point of intersection of lines in a graph is the solution to the graph
In this case, they intersect at (0, 0)
So, the solution is (0. 0)
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Which equation represents the vertex form of the equation y = x2 + 6x + 5?
The vertex form is:y(x-3)2-4
:) Good luck
Use the method of completing the square to express in vertex form.
Given
[tex]y = x^2 - 6x + 11[/tex]
To complete the square
add/subtract ( half the coefficient of the x- term )² to x² - 6x
[tex]y = x^2 + 2(- 3)x + 9 - 9 + 11[/tex], then
[tex]y = (x - 3)^2 + 2[/tex]
[tex]\bold{y= (x - 3)2 + 2}[/tex]An integer is 17 more than 4 times another. If the product of the two integers is -15, then find the integers.
Let's use algebra to solve this problem.
Let x be one of the integers, and y be the other integer.
From the problem, we know that:
x = 4y + 17 (one integer is 17 more than 4 times the other)
xy = -15 (the product of the two integers is -15)
We can use substitution to solve for one of the variables. From the first equation, we can write:
y = (x - 17)/4
Substituting this expression for y into the second equation gives:
x(x - 17)/4 = -15
Multiplying both sides by 4 and expanding gives:
x^2 - 17x = -60
Rearranging gives:
x^2 - 17x + 60 = 0
This is a quadratic equation that can be factored as:
(x - 5)(x - 12) = 0
So the solutions are:
x = 5, y = (-12/4) = -3
x = 12, y = (-5/4) = -1.25
Since the problem states that the integers are both integers, the only valid solution is:
x = 5, y = -3
Therefore, the two integers are 5 and -3.
please help me i really need help
Answer:
B. (-3, 4)
Step-by-step explanation:
x=0-3=-3
y=0+4=4
(-3, 4)
Answer:
(-3, 4)
Second answer choice
Step-by-step explanation:
The coordinates of A(0, 0) are shifted to the left by 3 units. A shift to the left means the new x- coordinate = old x-coordinate -3 = 0 -3
A shift up means the new y-coordinate = old y-coordinate + 4 + 0 + 4 = 4
Therefore the new coordinates of A are (-3, 4)
-5/8 - -4/3 in simplest form
Answer:
To subtract two fractions, you need to have a common denominator. The common denominator for 8 and 3 is 24.
-5/8 = -15/24 (multiply both the numerator and denominator by 3)
-4/3 = -32/24 (multiply both the numerator and denominator by 8)
Now, we can subtract the two fractions by subtracting their numerators while keeping the common denominator.
-15/24 - (-32/24) = -15/24 + 32/24 = 17/24
Therefore, -5/8 - -4/3 = 17/24 in its simplest form.
What is the longest flagpole (in whole feet) that could be shipped in a box that measures 2 ft by 2 ft by 15 ft?
The longest flagopole that could fit in the box is 15.26 feet
What is the longest flagopole that could fit in the box?The longest flagopole would have a length equal to the diagonal of the box.
It goes, lengthwise, from one vertex to the opposite vertex, and if the dimensions of the box are x, y, z, then the diagonal is:
d = √(x² + y² + z²)
In this case the box is 2ft by 2 ft by 15ft, then the diagonal is:
d = √(2² + 2² + 15²) = 15.26
That is the maximum length that can fit in the box, 15.26ft
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I’s it yes or no because you have to justify the answer
Yes, both triangles are similar.
What is similar triangle?Similar triangles are two triangles that have the same shape, but may differ in size. In other words, their corresponding angles are congruent and their corresponding sides are proportional. This means that if you were to scale one triangle up or down, it would still maintain the same shape as the other triangle.
In ΔABC,
AC² = 36² +15²
AC² = 1521 = 39²
AC = 39
In ΔXYZ,
XY² = 24² +10²
XY² = 676 = 26²
XY = 26
If the ratio of the sides of both triangles are similar So we can say that the both triangles are similar.
AB/XZ = BC/YZ = AC/XY
15/10 = 36/24 = 39/26
3/2 = 3/2 = 3/2
Here we can see that the ratio of the sides of both triangles are similar So we can say that the both triangles are similar.
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Need help my assignment is due in an hour. Please will be appreciated!
Answer:
a)g(x) = 2f(x+1)
B) the point (-1, 3) would end up at (-4, 1) on the new graph.
Step-by-step explanation:
Help!!
A hiker is climbing a local peak. After 1.5 hours of hiking, he is at an altitude of 220 feet. After 4 hours, he is at an altitude of 410 feet.
What is the hiker's altitude after 4.5
hours?
The hiker's altitude after 4.5 hours is 448 feet.
What is arithmetic?
Arithmetic is an elementary part of mathematics that consists of the study of the properties of the traditional operations on numbers—addition, subtraction, multiplication, division, exponentiation, and extraction of roots.
Here, we have
Given: A hiker is climbing a local peak. After 1.5 hours of hiking, he is at an altitude of 220 feet. After 4 hours, he is at an altitude of 410 feet.
We have to find the hiker's altitude after 4.5 hours.
We have height as a function of time:
x = time, y = height
Our two points are (1.5, 220), (4, 410), and (4.5,x)
(4-1.5) = (410-220)
2.5 = 190
1 = 190/2.5
1 hours = 76 feet
0.5 hours = 38 feet
4.5 hours = 410 + 38 feet = 448 feet
Hence, the hiker's altitude after 4.5 hours is 448 feet.
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PLEASE HELP QUICK 30 POINTS
What is the relationship between the radian measure of an angle and the length of the arc intercepted by that angle on the unit circle?
The radian measure of an angle is directly proportional to the length of the arc intercepted by that angle on the unit circle.
What is proportional?Proportional is a mathematical concept that describes the relationship between two or more values that have a constant ratio. It is commonly used to describe the relationship between two or more variables, such as the size of an object in relation to another or the amount of a certain item in relation to the total amount. In proportionality, the ratio of the amounts remains consistent, no matter what the size of the values.
This means that as the angle increases, so does the length of the arc. This is because the length of an arc is determined by the angle measure of the central angle created by the arc, and the radian measure of an angle is the ratio of the arc length to the radius of the circle. Therefore, if the angle measure increases, so does the arc length.
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Jillian measures two line segments. Segment A is 12.4 centimeters long and segment B is
4 centimeters in length. Which best represents the ratio of the length of segment A to the length
of segment B?
4
1
3.1
3.1
3.1 best represents the ratio of the length of segment A to segment B.
What is ratio?
By comparing two amounts of the same unit and finding the ratio, one can determine how much of one quantity is included in the other.
We are given that Jillian measures two line segments.
The length of Segment A is measured as 12.4 centimeters and the length of Segment B is measured as 4 centimeters.
So, on comparing both the lengths, we get
⇒12.4 : 4
⇒124 : 40
⇒3.1
Hence, 3.1 best represents the ratio of the length of segment A to segment B.
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Write and solve an equation to answer the question.
What number a is 24% of 25?
Answer:6
Step-by-step explanation:
24------100%
x--------25%
100x=25*24
x=25*24/100=24/4=6
i don’t know how to do it
The total resistance of three resistors in parallel s 2 Ohms. Option A
What is resistance?Resistance can be defined as the measure of the opposition to current flow in an electrical circuit.
Resistance is measured in Ohms, using the Greek symbol for omega (Ω).
It is also described as the hindrance to the flow of electrons in material.
It is important to note that for resistors in parallel, the total resistance is the reciprocal of the sum of reciprocals of the individual resistors.
This is represented as;
1/Rt = 1/R₁ + 1/R₂ + 1/R₃ ...
Where the variables , 'R' represented the resistors
Now, substitute the values, we have;
1/Rt = 1/4 + 1/8 + 1/8
Find the lowest common multiple
1/Rt = 2 + 1 + 1/8
1/Rt = 4/8
Take the reciprocal of the values
Rt = 8/4 = 2 Ohms
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How does the slope of the red triangle compare to the slope of the blue triangle 
A: the slope of the blue triangle is twice the slope of the red triangle
B: the slope of the red triangle steeper than the slope of the blue triangle
C: the slopes of the two triangles are the same
D: the slope of the red triangles have the slope of the blue triangle
Hence, in answering the stated question, we may say that C: the two graphs triangles' slopes are the same.
What is graphs?Mathematicians use graphs to visually explain or chart events or variables. A graph point often indicates a connection between one thing and another. A graph, a non-linear data structure, is constituted of nodes (vertices) and edges. Glue the nodes, which are also called as vertices. This graph has E=1, 2, 1, 3, 2, 4, and (2.5) edges and V=1, 2, 3, 5. (3.5). (4.5). Graphical representations of exponential growth in analytical charts (bar charts, pie charts, line charts, and so on). a graph of a logarithmic triangle.
According to the image you gave, both the red and blue triangles have the same slope. As a result, the solution is:
C: the two triangles' slopes are the same.
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There are rectangular cards divided into 4 equal cells with different shapes
, , , drawn in each cell. Cards can be placed side by side only if the
same shapes appear in adjacent cells on their common side. 9 cards are used
to form a rectangle as shown in the figure. Which of the following cards was
definitely NOT used to form this rectangle
The sοlutiοn οf the given prοblem οf rectangle cοmes οut tο be E is the answer.
A rectangle is what?In the Euclidean plane, a rectangle is a square with fοur perpendicular edges. It is alsο referred tο as an equiangular parallelοgram οr a seemingly equal-sided rectangle. The trapezοid can alsο have a straight edge. Fοur οf the sides οf a square are equal in length. Rectangular quadrilaterals have fοur equal sides and fοur 90° edges. Its name is sοmetimes "rectangular trapezοid" as a cοnsequence.
Here,
Due tο the shared suits οf the adjacent sectiοns.
Therefοre,
Case 1: Triangles and circles must be arranged in a series fοr hοrizοntal fitting.
Therefοre,
A, C, and D are excellent οptiοns. Sο they can't be the sοlutiοns.
Again,
Case 2.
Tο accοmmοdate vertically,
Rectangle and Triangle need tο be in the same cοlumn. And B is where that is happening.
sο that,
The οnly exceptiοn is:
"E" is the answer.
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Complete question:
A flower bed is in the shape of a triangle, with a base of 15 feet and a height of 9 feet. What is the area of the flower bed? (4 points)
The area of the flower bed is 67.5 square feet.
An area in mathematics is what?The area of an object is the space that is enclosed by its boundaries. The number of unit squares on the surface of a closed figure determines its area.
The following formula provides the area of a triangle:
(1/2) * Base * Height = Area
Inputting the values provided yields:
Area equals (1/2) * 15 * 9
Dimensions: 67.5 square feet
The flower bed therefore has a 67.5 square foot space.
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The annual rainfall in a certain region is approximately normally distributed with mean 40.9 inches
and standard deviation 5.3 inches. Round answers to the nearest tenth of a percent.
a) What percentage of years will have an annual rainfall of less than 44 inches?
%
%
b) What percentage of years will have an annual rainfall of more than 38 inches?
c) What percentage of years will have an annual rainfall of between 37 inches and 43 inches?
%
Answer:
a) To find the percentage of years with an annual rainfall of less than 44 inches, we need to find the area under the normal curve to the left of 44. Using a standard normal distribution table or a calculator, we find the z-score corresponding to 44 inches:
z = (44 - 40.9) / 5.3 = 0.585
The area to the left of z = 0.585 is approximately 0.7202. Therefore, about 72.0% of years will have an annual rainfall of less than 44 inches.
b) To find the percentage of years with an annual rainfall of more than 38 inches, we need to find the area under the normal curve to the right of 38. Using a standard normal distribution table or a calculator, we find the z-score corresponding to 38 inches:
z = (38 - 40.9) / 5.3 = -0.717
The area to the right of z = -0.717 is approximately 0.4713. Therefore, about 47.1% of years will have an annual rainfall of more than 38 inches.
c) To find the percentage of years with an annual rainfall between 37 inches and 43 inches, we need to find the area under the normal curve between the corresponding z-scores:
z1 = (37 - 40.9) / 5.3 = -0.736
z2 = (43 - 40.9) / 5.3 = 0.396
Using a standard normal distribution table or a calculator, we find the area between z = -0.736 and z = 0.396 is approximately 0.6181. Therefore, about 61.8% of years will have an annual rainfall between 37 inches and 43 inches.
Step-by-step explanation:
Step-by-step explanation:
a) To find the percentage of years with an annual rainfall of less than 44 inches, we need to find the area under the normal distribution curve to the left of 44 inches.
Using a standard normal distribution table or calculator, we can find the z-score:
z = (44 - 40.9) / 5.3 = 0.585
The area to the left of this z-score is approximately 0.72, or 72%.
Therefore, approximately 72% of years will have an annual rainfall of less than 44 inches.
b) To find the percentage of years with an annual rainfall of more than 38 inches, we need to find the area under the normal distribution curve to the right of 38 inches.
Using a standard normal distribution table or calculator, we can find the z-score:
z = (38 - 40.9) / 5.3 = -0.736
The area to the right of this z-score is approximately 0.77, or 77%.
Therefore, approximately 77% of years will have an annual rainfall of more than 38 inches.
c) To find the percentage of years with an annual rainfall between 37 inches and 43 inches, we need to find the area under the normal distribution curve between the z-scores for 37 inches and 43 inches.
Using a standard normal distribution table or calculator, we can find the z-scores:
z1 = (37 - 40.9) / 5.3 = -0.736
z2 = (43 - 40.9) / 5.3 = 0.394
The area between these z-scores is approximately 0.53, or 53%.
Therefore, approximately 53% of years will have an annual rainfall between 37 inches and 43 inches.
Ramona has saved $63. She has saved 3 times has much
money as Luke. How much money has Luke saved?
Answer:
Luke has saved $21
Step-by-step explanation:
Answer:
According to the problem, Ramona has saved 3 times as much money as Luke, so:
Ramona's savings = 3x
Luke's savings = x
The problem tells us that Ramona has saved $63, so we can write an equation:
3x = 63
To solve for x, we can divide both sides by 3:
x = 21
Therefore, Luke has saved $21.
Suppose the refills for a particular mechanical pencil
have a mean diameter of 0.5 mm and standard
deviation of 0.007 mm. Refills below 0.485 mm do not
stay in the pencil, while those above 0.520 mm do not
fit in the pencil at all.
What is the probability that a randomly chosen refill will
(Round all answers to nearest thousandths)
a) be too large?
b) be too small?
c) fit correctly?
回
Answer:
the probability that a randomly chosen refill will fit correctly is 0.9780 (rounded to three decimal places).
Step-by-step explanation:
We can use the standard normal distribution to solve this problem. We first need to calculate the z-scores for the given diameters.
a) To find the probability that a randomly chosen refill will be too large, we need to find the probability of getting a diameter greater than 0.520 mm.
z-score = (0.520 - 0.5) / 0.007 = 2.857
Using a standard normal table or calculator, we find that the probability of getting a z-score of 2.857 or greater is 0.0021.
Therefore, the probability that a randomly chosen refill will be too large is 0.0021 (rounded to three decimal places).
b) To find the probability that a randomly chosen refill will be too small, we need to find the probability of getting a diameter less than 0.485 mm.
z-score = (0.485 - 0.5) / 0.007 = -2.143
Using a standard normal table or calculator, we find that the probability of getting a z-score of -2.143 or less is 0.0164.
Therefore, the probability that a randomly chosen refill will be too small is 0.0164 (rounded to three decimal places).
c) To find the probability that a randomly chosen refill will fit correctly, we need to find the probability of getting a diameter between 0.485 mm and 0.520 mm.
First, we find the z-scores for each diameter:
z-score for 0.485 mm = (0.485 - 0.5) / 0.007 = -2.143
z-score for 0.520 mm = (0.520 - 0.5) / 0.007 = 2.857
Using a standard normal table or calculator, we find that the probability of getting a z-score between -2.143 and 2.857 is 0.9780.
Therefore, the probability that a randomly chosen refill will fit correctly is 0.9780 (rounded to three decimal places).
Please help me find the answer to this question pleaseeee
19. What is the total amount to be repaid on a 1-year term
loan of $800 with an interest rate of 14%?
A. $892
B. $902
C. $912
D. $922
Answer: the answer is C $912.
Step-by-step explanation: The interest on the loan is calculated as follows:
Interest = Principal x Rate x Time
where Principal is the amount borrowed, Rate is the interest rate as a decimal, and Time is the length of the loan in years. Substituting the given values, we get:
Interest = $800 x 0.14 x 1
Interest = $112
Therefore, the total amount to be repaid is the sum of the principal and the interest, which is:
Total amount = Principal + Interest
Total amount = $800 + $112
Total amount = $912
what is the largest possible median for the five number set (x,2x,3,2,5) if x can be any integer
The largest pοssible median fοr the five-number set (x, 2x, 3, 2, 5) is 8.5 (if x is οdd) οr 5.5 (if x is even)
What is Median?The median is the middle value in a set οf numbers arranged in οrder. It is the value that separates the higher half frοm the lοwer half.
Tο find the largest pοssible median fοr the five-number set (x, 2x, 3, 2, 5), we need tο cοnsider the different cases when x is an integer.
First, let's arrange the numbers in οrder:
{2, 3, 2x, 5, x}
Tο find the median, we need tο determine the middle number in the set. If the set has an οdd number οf elements, the median is the middle number. If the set has an even number οf elements, the median is the average οf the twο middle numbers.
Case 1: x is even
If x is even, then 2x is even and x < 2x. Therefοre, the middle numbers are 2x and 3, and the median is (2x + 3) / 2.
Case 2: x is οdd
If x is οdd, then 2x is even and 2 < 2x. Therefοre, the middle numbers are 2 and 2x, and the median is (2 + 2x) / 2.
Tο find the largest pοssible median, we need tο maximize (2x + 3) / 2 οr (2 + 2x) / 2, depending οn whether x is even οr οdd. This οccurs when x is the largest pοssible integer, which is:
x = 4 (if x is even)
x = 7 (if x is οdd)
Therefοre, the largest pοssible median fοr the five-number set (x, 2x, 3, 2, 5) is:
(2x + 3) / 2 = (2(7) + 3) / 2 = 8.5 (if x is οdd)
οr
(2x + 3) / 2 = (2(4) + 3) / 2 = 5.5 (if x is even)
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Ron has an average of 83.5 on the first four mathematics tests this marking period. He needs an average of 85 to make the honor roll. If there is only one more test this marking period, what score will Ron need to earn on the last test to give him average of 85? Show your work and explain how you arrived at your answer.
Answer: 86.5
Step-by-step explanation:
(83.5 + x )/2= 85
2(85)= 83.5 + x
170-83.5 =x
x= 86.5