Answers
6. Center: (-1, 1), Radius: 16
7. Center: (-6, -37), Radius: 0.75
8. Center: (2, -13), Radius: √150 ≈ 12.25
9. Center: (-7, -2), Radius: 3
10. Center: (10, 5), Radius: √28 ≈ 5.29
(If this doesn’t seem right to you make sure you comment!)
Related Questions
The table shows the part of the students in
each grade that participated in a sport this
year. Which grade had the greatest rate of participation? The least?
Answers
we see that the greatest rate of participation was in Grade 8, and the least rate of participation was in Grade 6.
How to find the grade had the greatest rate of participation?To compare the rates of participation in sports among the three grades, we can convert each percentage or fraction to a decimal and then compare the values.
Grade 6: 0.872
Grade 7: 0.87 (87% converted to decimal)
Grade 8: 0.875 (7/8 converted to decimal)
Therefore, we see that the greatest rate of participation was in Grade 8, and the least rate of participation was in Grade 6.
Answer:
Grade 8 had the greatest rate of participation.
Grade 6 had the least rate of participation.
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what are the outcomes
A 6 sided number cube is rolled 5 times
Answers
Answer:
7776 outcomes
Step-by-step explanation:
To get the total number of outcomes we multiply the total number of possibilities for each roll. Since there are 5 rolls, the total number of outcomes will be:
6 x 6 x 6 x 6 x 6 = 7776 outcomes
traveling 60 mhp in the car after 3 hours how long would that be
Answers
Answer:
Step-by-step explanation:
60 x 3 = 180
180 miles
In the united states, the number of children under age 18 per family is skewed right with a mean of 1.9 children and a standard deviation of 1.1 children.
analyst 1 wants to calculate the probability that a randomly selected family from the united states has at least 2 children.
analyst 2 wants to calculate the probability that if 40 families from the united states are randomly selected, the mean number of children per family is at least 2 children.
what sample size does analyst 1 plan to use?
enter an integer. what sample size does analyst 2 plan to use?
enter an integer.
Answers
The probability of a randomly selected family from the United States having at least 2 children is 0.2734. The probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children is 0.1884. Analyst 1 plans to use a sample size of 1 and analyst 2 plans to use a sample size of 40.
Analyst 1 wants to calculate the probability that a randomly selected family from the United States has at least 2 children. Since the number of children under age 18 per family is skewed right with a mean of 1.9 children and a standard deviation of 1.1 children, we can use the normal distribution to solve this problem.
To calculate the probability of a randomly selected family having at least 2 children, we need to find the area under the normal curve to the right of 2.
Using a standard normal distribution table or calculator, we can find that the area to the right of 2 is approximately 0.2734. Therefore, the probability of a randomly selected family from the United States having at least 2 children is 0.2734.
Analyst 2 wants to calculate the probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children. Since we know that the mean number of children per family in the population is 1.9 children and the standard deviation is 1.1 children, we can use the central limit theorem to approximate the sampling distribution of the sample means.
The central limit theorem tells us that the sampling distribution of the sample means will be approximately normal with a mean of 1.9 children and a standard error of the mean equal to the population standard deviation divided by the square root of the sample size.
We want to find the probability that the mean number of children per family is at least 2, so we need to standardize the sample mean using the formula:
z = (sample mean - population mean) / (standard error of the mean)
Plugging in the values, we get:
z = (2 - 1.9) / (1.1 / sqrt(40)) = 0.889
Using a standard normal distribution table or calculator, we can find that the area to the right of 0.889 is approximately 0.1884. Therefore, the probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children is 0.1884.
So, analyst 1 plans to use a sample size of 1 and analyst 2 plans to use a sample size of 40.
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Decide whether the triangles are similar. If so, determine the appropriate expression to solve for x.
Triangles ABC and EDF; triangle ABC has angle A measuring 53 degrees, angle C measuring 62 degrees, side AC labeled as y, side AB labeled as w, and side BC labeled as x; triangle EDF has angle D measuring 61 degrees, angle F measuring 53 degrees, side DE labeled z, side EF labeled u, and side DF labeled r.
The triangles are not similar; no expression for x can be found.
ΔABC ~ ΔDEF; x equals r times w over u
ΔABC ~ ΔEFD; x equals r times w over u
ΔABC ~ ΔEFD; x equals r times w over z
Answers
The triangles ABC and EDF are similar, and x = r × w/u.
As per the question, we have angle A in triangle ABC congruent to angle F in triangle EDF, angle C in triangle ABC congruent to angle D in triangle EDF, and angle B in triangle ABC congruent to angle E in triangle EDF.
Therefore, the triangles are similar by the Angle-Angle (AA) similarity theorem.
To find the expression for x, we can use the fact that the corresponding sides of similar triangles are proportional.
In this case, we have:
x/w = u/r (corresponding sides of similar triangles)
Solving for x, we get:
x = r × w/u
Therefore, x = r × w/u, and it can use this expression to solve for x in triangle ABC and EDF.
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Evaluate each geometric series described. . 34) a, =-2, a = 256, r=-2 n 33) a=-1, a = 512, r=-2 : A) 397 B) 341 -- B) 149 1 2 A) 3 C) 170 C) - D) 463 D) 156 3 n 71 35) a, = 4, a = 16384, r=4 , , A) 22
Answers
(34) the sum of the series is 170. (33) The sum of the series is 341. (35) the sum of the series is 21844
To evaluate a geometric series, we use the formula:
Sn = a(1 - r^n) / (1 - r)
where:
Sn = the sum of the first n terms of the series
a = the first term of the series
r = the common ratio between consecutive terms
n = the number of terms we want to sum
Let's use this formula to evaluate the given geometric series:
34) a1 = -2, a8 = 256, r = -2
To find the sum of this series, we need to know the value of n. We can find it using the formula:
an = a1 * r^(n-1)
a8 = -2 * (-2)^(8-1) = -2 * (-2)^7 = -2 * (-128) = 256
Now we can solve for n:
an = a1 * r^(n-1)
256 = -2 * (-2)^(n-1)
-128 = (-2)^(n-1)
2^7 = 2^(1-n+1)
7 = n-1
n = 8
So this series has 8 terms. Now we can use the formula to find the sum:
Sn = a(1 - r^n) / (1 - r)
S8 = (-2)(1 - (-2)^8) / (1 - (-2))
S8 = (-2)(1 - 256) / 3
S8 = 510 / 3
S8 = 170
Therefore, the sum of the series is 170.
33) a1 = -1, a9 = 512, r = -2
We can use the same method as before to find n:
an = a1 * r^(n-1)
512 = -1 * (-2)^(9-1) = -1 * (-2)^8
512 = 256
This is a contradiction, so there must be an error in the problem statement. Perhaps a9 is meant to be a5, in which case we can find n as:
an = a1 * r^(n-1)
a5 = -1 * (-2)^(5-1) = -1 * (-2)^4
a5 = 16
512 = -1 * (-2)^(n-1)
-512 = (-2)^(n-1)
2^9 = 2^(1-n+1)
9 = n-1
n = 10
So this series has 10 terms. Now we can use the formula to find the sum:
Sn = a(1 - r^n) / (1 - r)
S10 = (-1)(1 - (-2)^10) / (1 - (-2))
S10 = (-1)(1 - 1024) / 3
S10 = 1023 / 3
S10 = 341
Therefore, the sum of the series is 341.
35) a1 = 4, a14 = 16384, r = 4
Again, we can find n using the formula:
an = a1 * r^(n-1)
16384 = 4 * 4^(14-1) = 4 * 4^13 = 4 * 8192 = 32768
This is a contradiction, so there must be an error in the problem statement. Perhaps a14 is meant to be a7, in which case we can find n as:
an = a1 * r^(n-1)
a7 = 4 * 4^(7-1) = 4 * 4^6 = 4 * 4096 = 16384
16384 = 4 * 4^(n-1)
4096 = 4^(n-1)
2^12 = 2^(2n-2)
12 = 2n-2
n = 7
So this series has 7 terms. Now we can use the formula to find the sum:
Sn = a(1 - r^n) / (1 - r)
S7 = (4)(1 - 4^7) / (1 - 4)
S7 = (4)(1 - 16384) / (-3)
S7 = 65532 / 3
S7 = 21844
Therefore, the sum of the series is 21844.
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Huang buys 3 shirts that each cost the same amount a pair of pants that cost 12$ and pays with a 100$ bill which expressesion represents the amount of change huang receive
Answers
Answer: 64$
Step-by-step explanation:
An angle measures 11.4° more than the measure of its complementary angle. What is the measure of each angle?
Answers
The measure of the angle is 50.7° and the measure of its complementary angle is 39.3°.
What is the measure of each angle?Let x be the measure of the angle and y be the measure of its complementary angle.
Then we have:
x = y + 11.4 (since the angle measures 11.4° more than its complementary angle)
x + y = 90 (since the two angles are complementary)
Substituting the first equation into the second equation, we get:
(y + 11.4) + y = 90
2y + 11.4 = 90
2y = 78.6
y = 39.3
Substituting y = 39.3 into the first equation, we get:
x = y + 11.4 = 50.7
So, we have
x = 50.7
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Jayden need wood to enclose his garden he measures one side of his garden and finds it is 6 feetlong how many feet of wood does jayden need to enclose his garden
Answers
To enclose his garden, Jayden needs 24 feet of wood assuming his rectangular-shaped garden has sides of 6 feet each.
How much wood does Jayden need?Jayden needs wood to enclose his garden. He measured one side of his garden and found that it is 6 feet long.
To calculate how many feet of wood Jayden needs to enclose his garden, we need to know the length of all sides of the garden.
Assuming that the garden is rectangular in shape, we need to know the length of the other side as well.
Let's say the other side is also 6 feet long. In this case, we can calculate the total length of wood required by using the formula for the perimeter of a rectangle, which is:
Perimeter = 2 x (Length + Width)
Here, the length and width of the garden are both 6 feet.
So, we can substitute these values in the formula and get:
Perimeter = 2 x (6 + 6) = 2 x 12 = 24 feet
Therefore, Jayden needs 24 feet of wood to enclose his garden.
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John has a pepper shaker in the shape of a cylinder. It has a radius of 9 mm and a height of 32 mm. John wants to cover the pepper shaker with tape, How much tape is needed? Round to the hundredths
Answers
John needs approximately 1,814.4 mm² of tape to cover the pepper shaker. Rounded to the hundredths, the answer is 1,814.40 mm².
To calculate the amount of tape needed to cover the pepper shaker, we need to find the lateral area of the cylinder. This is given by the formula L = 2πrh, where r is the radius and h is the height.
Substituting the values given, we get L = 2π(9 mm)(32 mm) = 1,814.4 mm².
Therefore, John needs approximately 1,814.40 mm² of tape to cover the pepper shaker.
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6. Mary Cole is buying a $225,000.00 home. Her annual housing
expenses are: mortgage payments, $14,169.20; real estate taxes,
$3,960.00; annual insurance premium, $840.00; maintenance,
$1,410.00; and utilities, $5,180.00. What is Mary's average
monthly expense?
Chapter 10 Mathematics for Business and Personal Finance
Answers
Mary's average monthly expense for housing is $2,129.93.
To find Mary's average monthly expenseWWe need to add up all her annual housing expenses and divide the total by 12 (the number of months in a year):
Total annual housing expenses = mortgage payments + real estate taxes + annual insurance premium + maintenance + utilities
Total annual housing expenses = $14,169.20 + $3,960.00 + $840.00 + $1,410.00 + $5,180.00
Total annual housing expenses = $25,559.20
Average monthly expense = Total annual housing expenses ÷ 12
Average monthly expense = $25,559.20 ÷ 12
Average monthly expense = $2,129.93
Therefore, Mary's average monthly expense for housing is $2,129.93.
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what is the simplified form of the expression below (3m^4n)^3(2m^2n^5p)/6m^4n^9p^8
Answers
For the expression (3m⁴n)³(2m²n⁵p)/6m⁴n⁹p⁸, the simplified-value is 9m¹⁰n⁻¹p⁻⁷.
To simplify the expression (3m⁴n)³(2m²n⁵p)/6m⁴n⁹p⁸, we first use the exponent-rule that states (qᵃ)ᵇ = qᵃᵇ to simplify the first part of the expression:
⇒ (3m⁴n)³ = 3³(m⁴)³n³ = 27m¹²n³;
Next, we can simplify the denominator by using the rules of exponents to combine the like terms:
⇒ 6m⁴n⁹p⁸ = 2×3m⁴n⁹p⁸;
Substituting the values,
We get;
⇒ (27m¹²n³)×(2m²n⁵p)/(2*3m⁴n⁹p⁸);
Simplifying the expression by cancelling out the common factors, we get:
⇒ 9m¹⁰n⁻¹p⁻⁷;
Therefore, the simplified-value is : 9m¹⁰n⁻¹p⁻⁷.
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The given question is incomplete, the complete question is
What is the simplified form of the expression below (3m⁴n)³(2m²n⁵p)/6m⁴n⁹p⁸;
(1 point) Write an equivalent integral with the order of integration reversed IMP3 F(x,y) dyd. = Lo g(x) F(x, y) dedy f(y) a = be f(y) = 9(y) =
Answers
the equivalent integral with the order of integration reversed is: ∫0^1 ∫1^2 log(x) 9(y) dydx = (9/2) (2log(2) - 1)
To write an equivalent integral with the order of integration reversed, we need to integrate first with respect to y and then with respect to x. So, we have:
∫a^b ∫f(y)g(x) F(x,y) dxdy
Reversing the order of integration, we get:
∫f(y)g(x) ∫a^b F(x,y) dydx
Now, substituting the given values for f(y), g(x), and F(x,y), we get:
∫0^1 ∫1^2 log(x) 9(y) dydx
= ∫0^1 [9(y)∫1^2 log(x) dx] dy
= ∫0^1 [9(y) (xlog(x) - x) from x=1 to x=2] dy
= ∫0^1 [9(y) (2log(2) - 2 - log(1) + 1)] dy
= ∫0^1 [9(y) (2log(2) - 1)] dy
= (9/2) [(2log(2) - 1) y] from y=0 to y=1
= (9/2) (2log(2) - 1)
Therefore, the equivalent integral with the order of integration reversed is:
∫0^1 ∫1^2 log(x) 9(y) dydx = (9/2) (2log(2) - 1)
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Help pls! Find the area of the circle
Use π = 3.14 and round your answer to the nearest hundredth.
Answers
the area of the circle is 615. 4 m²
How to determine the area
The formula that is used to calculate the area of a circle is expressed with the equation.
We have the equation as;
A = πr²
Such that the parameters are given as;
A is the area of the circleπ takes the constant value of 22/7 or 3.14r is the radius of the circleFrom the diagram shown, we have that;
A = unknown
r = 14m
Now, substitute the values, we get;
Area = 3.14 ×14²
Find the square value
Area = 3.14(196)
Multiply the values
Area = 615. 4 m²
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A rhombus has a perimeter of 88 and
two acute angles that measure 40° each.
Find the length of the shorter diagonal.
PLEASE HELP ME ASAP
Answers
The length of the shorter diagonal is approximately 7.07 units.
A rhombus is a four-sided polygon in which all sides are equal in length. It is also called a diamond shape because it is often used for diamond-shaped figures. In this case, we are given that the perimeter of the rhombus is 88. Since all sides of the rhombus are equal, we can divide the perimeter by 4 to find the length of one side.
88 ÷ 4 = 22
Therefore, each side of the rhombus measures 22 units.
We are also given that two of the angles in the rhombus are acute angles measuring 40° each. Since all angles in a rhombus are equal, we can find the measure of the other two angles by subtracting the sum of the acute angles from 360.
360 - 2(40) = 280
Each of the other two angles measures 140°.
To find the length of the shorter diagonal, we can use the formula:
Shorter diagonal = (2 × Area) / Length of longer diagonal
The area of a rhombus can be found by multiplying the length of the longer diagonal by the length of the shorter diagonal and then dividing by 2.
Area = (diagonal1 × diagonal2) / 2
We know that the longer diagonal is twice the length of the shorter diagonal.
Longer diagonal = 2 × Shorter diagonal
Substituting these values into the formula, we get:
Shorter diagonal = (2 × (22 × Shorter diagonal × sin 40°)) / (2 × Longer diagonal)
Simplifying, we get:
Shorter diagonal = (22 × Shorter diagonal × sin 40°) / Longer diagonal
Plugging in the values we know, we get:
Shorter diagonal = (22 × Shorter diagonal × sin 40°) / (2 × Shorter diagonal)
Shorter diagonal = 11 × sin 40°
Using a calculator, we can find that:
Shorter diagonal ≈ 7.07
Therefore, the length of the shorter diagonal is approximately 7.07 units.
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QUESTION IN PHOTO I MARK BRAINLIEST
Answers
The value of x in the intersecting chord is determined as 18.6.
What is the value of x?The value of x is calculated by applying intersecting chord theorem, which states that the angle at center is equal to the arc angle of the two intersecting chords.
m ∠EDF = arc angle EF
50 = 5x - 43
The value of x is calculated as follows;
5x = 50 + 43
5x = 93
divide both sides by 5;
5x/5 = 93/5
x = 18.6
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Ariana has 144 peaches. She has to pack 9 boxes with an equal number of peaches. How many peaches should she pack in each box.
Answers
Answer:
16 peaches
Step-by-step explanation:
Let's break this down:
Total: 144 peaches
Number of boxes she has to fill evenly: 9
Question: How many peaches are able to fit into each box evenly?
144 peaches/9 boxes = 16 peaches
So, Ariana should pack 16 peaches into each box
Hope this helps :)
Lucinda has already earned $30 walking dogs. She earns $3 per dog walked, and she needs at least $80 to buy more leashes. Write and solve an inequality to determine how many more dogs Lucinda will need to walk to have at least $80.
Answers
I would say she has to walk 17 dogs, im not sure if that's correct though
Let's assume that Lucinda needs to walk "x" more dogs to have at least $80. Then, the amount of money she will earn from walking those "x" dogs can be calculated by multiplying the number of dogs by the amount of money earned per dog, which is $3:
Amount of money earned from walking "x" dogs = $3x
To determine how many more dogs Lucinda needs to walk to have at least $80, we can write the following inequality:
$30 + $3x ≥ $80
Simplifying the inequality, we get:
$3x ≥ $50
Dividing both sides by 3, we get:
x ≥ 16.67
Since we can't walk a fraction of a dog, we need to round up to the nearest whole number. Therefore, Lucinda needs to walk at least 17 more dogs to have at least $80.
Which triangle has an obtuse angle?
Answers
Answer:
Step-by-step explanation:
An obtuse angle has a measure between 90 and 180 degrees. Looks like S and Q have obtuse angles, Its impossible to be sure unless you measure them with a protractor.
Consider the quadratic function: f(x)=x^2-6x+8
Identify the coordinates of the x(intercepts if any
Answers
Answer:
x-intercepts (4,0) (2,0)
y-intercepts (0,8)
Step-by-step explanation:
have a good day :)
Describe and correct the error in finding the circumference of ⊙C
Answers
Step-by-step explanation:
C= 2πr
Given,
Diameter= 9
so, radius = 9÷2 = 4.5
C= 2 x π x 4.5
= 28.3 (3.s.f)
A non-government that supports palay production in the philippines conducted the research that answer the question: is the proportion of palay harvested different from 0. 50 of all the farm crops are harvested? in a sample of 200 one-hectare farm lands, 96 harvested palay.
Answers
For the sample size of 200 and sample data 96 there is no sufficient evidence to conclude that proportion of palay harvested is different from 0.50.
Sample size 'n' = 200
The proportion of palay harvested is different from 0.50
Use a hypothesis test.
Let us assume the null hypothesis H₀ is that the proportion of palay harvested is equal to 0.50,
and the alternative hypothesis Hₐ is that the proportion of palay harvested is different from 0.50.
H₀: p = 0.50 proportion of palay harvested is equal to 50%
Hₐ: p ≠ 0.50 proportion of palay harvested is not equal to 50%
where p is the population proportion of palay harvested.
To test this hypothesis, use the sample data of 96 out of 200 one-hectare farm lands that harvested palay.
The sample proportion of palay harvested is,
p₁= 96/200
= 0.48
To determine if this sample proportion is significantly different from the hypothesized proportion of 0.50,
Use a two-tailed z-test with a significance level of α = 0.05.
The test statistic is calculated as,
z = (p₁ - p) / √(p(1-p)/n)
where n is the sample size.
Substituting the values, we get,
z = (0.48 - 0.50) / √(0.50(1-0.50)/200)
⇒ z = -0.5658
Using a z-table,
The probability of getting a z-value of -0.5658 or lower in the left tail of the distribution is approximately 0.7123.
Since this is a two-tailed test,
Probability of getting a z-value of 0.5658 or higher in the right tail of the distribution is also approximately 0.7123
p-value for this test is 0.7123+ 0.7123 = 1.4246
Since the p-value is greater than the significance level of α = 0.05,
Fail to reject the null hypothesis.
Therefore, do not have sufficient evidence to conclude that the proportion of palay harvested is different from 0.50.
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PLEASE HELP THIS IS MY LAST QUESTION PLEASEEEEEE
Given PQR with angle P = 42°, angle R = 26°, and PQ = 19, solve the triangle. Round all answers to the nearest tenth.
Angle Q =__
QR =__
PR =__
Answers
To solve the triangle, we have;
Angle Q = [tex]112^{o}[/tex]
QR = 30.0
PR = 40.2
What is a sine rule?A sine rule is a trigonometric function that can be applied to determined the unknown side, or angle of a none right triangle.
From the information given in the question, to solve the triangle;
P + R + Q = 180
42 + 26 + Q = 180
Q = 180 - 68
= 112
Q = [tex]112^{o}[/tex]
Applying the sine rule,
QR/Sin P = PR/Sin Q = PQ/Sin R
PR/Sin Q = PQ/Sin R
PR/Sin 112 = 19/ Sin 26
PRSin 26 = 19*Sin 112
= 17.6165
PR = 17.6165/ 0.4384
= 40.1836
PR = 40.2
Also,
QR/Sin P = PQ/Sin R
QR/Sin 42 = 19/ Sin 26
QRSin 26 = 19*Sin 42
= 12.7135
QR = 12.7135/ 0.4384
= 28.9998
QR = 30
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f(x, y) = ex sin y do first and second order partial derivatives. f(x, y) = e^x sin y. do first and second order partial derivatives
Answers
The first order partial derivatives of f(x, y) = ex cos y and the second order partial derivatives are ex sin y = ex cos y.
The given function is f(x, y) = ex sin y. We need to find the first and second order partial derivatives of this function with respect to x and y.
First order partial derivatives:
To find the partial derivative of f(x, y) with respect to x, we treat y as a constant and differentiate ex with respect to x. This gives:
∂f/∂x = ex sin y
To find the partial derivative of f(x, y) with respect to y, we treat x as a constant and differentiate sin y with respect to y. This gives:
∂f/∂y = ex cos y
Second order partial derivatives:
To find the second order partial derivatives, we differentiate the first order partial derivatives we found above. That is, we differentiate ∂f/∂x and ∂f/∂y with respect to x and y, respectively.
∂/∂x (ex sin y) = ex sin y
∂/∂y (ex cos y) = -ex sin y
To find the mixed partial derivatives, we differentiate one of the first order partial derivatives with respect to the other variable. That is,
∂/∂y (ex sin y) = ex cos y
We can also find the mixed partial derivative by differentiating ∂f/∂y with respect to x, which gives the same result:
∂/∂x (ex cos y) = ex cos y
The first order partial derivatives of f(x, y) = ex sin y are ∂f/∂x = ex sin y and ∂f/∂y = ex cos y and the second order partial derivatives are ex sin y, ∂f/∂[tex]y^2[/tex] = -ex sin y, and ∂f/∂x∂y = ∂f/∂y∂x = ex cos y.
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Un Jardinero usa un total de 61. 5 galones de gasolina en un mes. De la cantidad total
3/5
de gasolina, se usaron en sus cortadoras de césped. ¿Cuántos galones de gasolina usa
el jardinero en sus cortadoras de césped en ese mes? Me ayudan plis
Answers
The gardener used 36.9 gallons of gasoline in the lawnmowers in that month.
What are proportions?In mathematics, a proportion is a statement that two ratios are equal. It expresses the relationship between two or more quantities that are directly proportional to each other. A proportion can be represented as an equation of the form:
a/b = c/d
We know that the gardener used a total of 61.5 gallons of gasoline in a month and that 3/5 of that total was used in the lawnmowers.
To find out how much gasoline the gardener used in the lawnmowers, we need to multiply the total amount of gasoline by 3/5:
61.5 gallons x 3/5 = 36.9 gallons
Therefore, the gardener used 36.9 gallons of gasoline in the lawnmowers in that month.
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Find the probability that a point chosen randomly inside the rectangle is in each given shape. Round to the nearest tenth.
Answers
1. The probability that the point chosen is in the triangle is 0.1 (nearest tenth)
2. The probability that the point is in the square is 0.2( nearest tenth)
What is probability?A probability is a number that reflects the chance or likelihood that a particular event will occur. The certainty for an event is 1 which is equivalent to 100%.
Probability = sample space / total outcome
total outcome is the area of rectangle , which is
A = l× w
= 12 × 8
= 96
area of the rectangle = 1/2 bh
= 1/2 × 4 × 5
= 2 × 5
= 10
Area of the square = 4×4
= 16
1. Probability the the point will be in the triangle= 10/96 = 5/48
= 0.1( nearest tenth)
2. probability the the point will be in the square =
16/96 = 1/6
= 0.2 ( nearest tenth)
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2
How much water will a cone hold that has a diameter of 6 inches and a height of 21 inches.
Use 3. 14 for 7 and round your answer to the nearest whole number.
A 66 cubic inches
B 198 cubic inches
C) 594 cubic inches
D 2374 cubic inches
Answers
The volume of water a cone with a diameter of 6 inches and a height of 21 inches can hold is 198 cubic inches. So, the correct answer is B) 198 cubic inches.
To find the volume of water a cone with a diameter of 6 inches and a height of 21 inches can hold, we will use the formula for the volume of a cone: V = (1/3)πr²h.
Given a diameter of 6 inches, the radius (r) is 3 inches. The height (h) is 21 inches, and we will use 3.14 as an approximation for π.
V = (1/3) * 3.14 * (3²) * 21
V = (1/3) * 3.14 * 9 * 21
V = 3.14 * 3 * 21
V = 197.82 cubic inches
Rounding to the nearest whole number, the volume of water the cone can hold is approximately 198 cubic inches. Therefore, the answer is B) 198 cubic inches.
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If the circumference of a circle is 50. 4 ft, what is its area? (Use π = 3. 14) *
2 points
50. 24 sq ft
113. 04 sq ft
202. 24 sq ft
314 sq ft
Answers
The area of the circle is approximately 202.03 square feet
If the circumference of a circle is 50.4 ft, we can use the formula for the circumference of a circle to find its radius:
C = 2πr
C = circumference
r = radius
r = C / (2π)
Substituting C = 50.4 ft, we get:
r = 50.4 / (2π)
Using a calculator, we can approximate this value to be:
r =25.2/π ft
A circle's area can be calculated using the following formula:
A = πr²
Substituting r = 25.2/π ft, we get:
A = π(25.2/π)²
= 635.04/3.14
= 202.03
Therefore, the area of the circle is approximately 202.03 square feet.
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The cost of manufacturing a certain type of headphone varies inversely as the number of headphones increases. If 8000 headphones can be manufactured for $8. 00 each, find the cost to manufacture 2000 headphones
Answers
The cost to manufacture 2000 headphones as the number of headphones varies inversely with the cost of manufacture is $32
Let x = number of headphones
y = cost of manufacturing headphones
The cost of manufacturing a certain type of headphones is inversely proportional to the number of headphones.
The equation for inversely proportional is
x₁ y₁ = x₂ y₂
x₁ = 8000 , y₁ = 8 , x₂ = 2000 y₂ = ?
Putting the value in the equation we get ,
8000 × 8 = 2000 × y₂
64000/2000 = y₂
y₂ = 32
Cost of manufacturing 2000 headphones is 32 .
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In a school of 580 students, one class was asked which hand they write with.
• “L” means they use their left hand.
• “R” means they use their right hand.
Here are the results:
L, R, R, R, R, R, R, R, R, L, R, R, R, R, R
1) Based on this sample, estimate the proportion of students at the school who write with their left hand.
2) Estimate the number of students at the school who write with their left hand.
3) A different class of `18` students is surveyed. Estimate how many write with their left hand.
Answers
1. The proportion of students at the school who write with their left hand is 2/15 OR 13.3%
2. The estimated number of students who write with their left hand is 77 students
3. The estimated number of students in the different class of 18 students who write with their left hand is 2
Estimating the number of students that write with their left handFrom the question, we are to estimate the proportion of students who write with their left hand
To estimate the proportion of students at the school who write with their left hand, we need to count the number of students in the sample who write with their left hand and divide by the total number of students in the sample.
From the given sample, there are 2 students who write with their left hand and 13 students who write with their right hand. So the estimated proportion of students who write with their left hand is:
2/15 = 0.133
OR
13.3%
2.
To estimate the number of students at the school who write with their left hand, we can multiply the proportion by the total number of students in the school
That is,
2/15 x 580 = 77.33
Thus, about 77 students write with their left hand
3.
To estimate how many students in a different class of 18 students write with their left hand, we can apply the proportion to the new sample:
2/15x 18 = 2.4
Hence, about 2 students in the different class write with their left hand.
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