If dimensions of the globe that is 16 inches in diameter were reduced by half, then its volume would be [tex]$V= 267.9 \text{ in}^{3}$[/tex]
What is volume ?The volume of an object is a measure of the amount of space occupied by that object.
Here given that originally diameter was 16 inches but then dimensions of the globe was reduced by half
The new diameter is equal to
[tex]$$D=16 / 2=8 \mathrm{in}$$[/tex]
Hence radius is equal to
[tex]$$r=8 / 2=4 \mathrm{in}$$[/tex]
The volume of the reduced globe is
[tex]$V=\frac{4}{3}(\pi)(r)^{3}$[/tex]
[tex]$V=\frac{4}{3}(3.14)(4)^{3}$\\[/tex]
[tex]$V= 267.9 \text{ in}^{3}$[/tex]
If dimensions of the globe that is 16 inches in diameter were reduced by half, then its volume would be [tex]$V= 267.9 \text{ in}^{3}$[/tex]
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Answer:
267.9 in3
Step-by-step explanation:
I took the test and got it right!
Please help me with the questions Please please please ASAP ASAP please ASAP help please please ASAP please please help ASAP ASAP please please help please please ASAP please please help ASAP ASAP please please help please please ASAP please
Answer:
9
Step-by-step explanation:
8/12=6/x
cross multiply to get 9
Help I’m being timed!
Rachel bought $517 worth of clothes 12% off. What is her total? Show work.
Answer:
454.96
Step-by-step explanation:
Suppose that the total price of worth clothes equal : x
Rachel bought them with 12% off which means , Rachel bought them :
( x ) - ( 12x / 100 )
As the question told the above equation must equal 517$ , So :
( 100x / 100 ) - ( 12x / 100 ) = 517
100x - 12x / 100 = 517
88x / 100 = 517
multiply sides by 100
88x = 51700
Divide sides by 88
x = 587.5 $
Thus the total price is 587.5 $ .
Can somebody please help a brother out?:))
Plz help!! Dont answer if you cant help
Answer:
94.88 cubic units
Step-by-step explanation:
Volume of the prism = Area of base * Height
[tex] = 5( \frac{1}{2} \times 2.75 \times 4) \times 3.45 \\ \\ = 5 \times 2.75 \times 2 \times 3.45 \\ \\ = 10\times 2.75 \times 3.45 \\ \\ = 94.875 \\ \\ \approx 94.88 \: cubic \: units[/tex]
A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Use Sheet 3 of the Excel file to create a histogram, and calculate x¯, the t-statistic, and the p-value.
From the histogram, can normality be assumed?
x¯=
t=
p=
Since the p-value is
evidence exists that the mean GPA is greater than 2.75.
than the significance level 0.05, the null hypothesis
.
Pick Yes No
Pick greater less
Pick fails to be rejected is rejected
3.09
2.73
2.58
2.68
2.84
2.68
2.64
2.62
2.35
2.72
2.63
2.77
2.72
3.03
2.71
2.96
2.74
3.01
2.88
2.68
2.83
3.02
2.83
2.71
2.67
2.79
2.65
2.56
2.78
2.89
2.40
2.38
2.41
2.83
2.86
3.01
2.80
2.84
2.95
2.75
2.93
2.48
2.34
2.97
2.85
2.74
2.84
3.10
2.62
2.77
The mean GPA is greater than 2.75.
Here, we have,
A= 4.0, A- = 3.7, B+ = 3.
three, and many others.
Total the first-class factors, and overall the credit hours. Divide the overall satisfactory points by means of the overall credit score hours.
Grade Point Average (GPA):
Grade point average (GPA) is the measure used to summarize your instructional fulfillment at Griffith. After the e-book of final grades every trimester, your software and career.
GPA is calculated and could be utilized by the college to tell choices, which include the subsequent: educational progression.
Divide the total range of grade factors earned with the aid of the total number of letter-graded units undertaken.
Mean GPA = total / 50
= 2.75.
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- 2. Find the inverse of the matrix (AAB)-, where A and B are invertible n x n matrices. Confirm you found the inverse by showing that (Your inverse matrix) - (AAB)-' = 1 and (AAB)-. (Your inverse mat
The inverse of the matrix (AAB)- can be found by taking the inverse of A, the inverse of B, and the inverse of AAB.
How to find the inverse of the matrix (AAB)- by using the inverses of A and B?To find the inverse of the matrix (AAB)-, we can utilize the properties of matrix inverses.
Given that A and B are invertible n x n matrices, we can express the inverse of (AAB)- as the product of the inverses of A, B, and AAB in the reverse order.
In mathematical notation, the inverse of (AAB)- can be represented as (AAB)-1 = B-1A-1(AAB)-1.
To confirm that the obtained inverse is correct, we can evaluate the expression (AAB)-1(AAB)- and verify that it equals the identity matrix.
Similarly, we can multiply (AAB)- with (AAB)-1 and check if it results in the identity matrix.
By performing these calculations and observing that the resulting product is indeed the identity matrix, we can confirm the correctness of the inverse.
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The ratio of cement to gravel in a road
surface is 3:17. Find the percent
of cement in the mixture.
Why is it important to remember the definitions of binomial, continuous, discrete, interval, nominal, ordinal, and ratio variables?
It is important to remember the definitions of binomial, continuous, discrete, interval, nominal, ordinal, and ratio variables because these are different types of data which need different methods of analysis.
Nominal variables are variables used for identification or categorization. Nominal data cannot be ranked, ordered, or compared. The gender, ethnicity, religion, and hair color of an individual are all examples of nominal variables.
Ordinal variables are variables that can be ranked or ordered, but the difference between each point on the scale is not constant. For example, we could use an ordinal variable to describe the class ranks of students: 1st, 2nd, 3rd, and so on. While there is a clear order to the data, the difference between each rank is not necessarily the same.
Interval variables have equal distances between each value, and they also have a true zero point. For example, a temperature measurement is an interval variable because the difference between 20 degrees Celsius and 30 degrees Celsius is the same as the difference between 30 degrees Celsius and 40 degrees Celsius.
Ratio variables have equal intervals between each value and have a true zero point. For example, weight is a ratio variable because a weight of zero means that there is no weight.
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PLZ HELP round to the nearest cent!!
Answer:
$85.09
Step-by-step explanation:
11) Krystal and Rob each improved their yards by planting hostas and ivy. They bought their
supplies from the same store. Krystal spent $132 on 8 hostas and 4 pots of ivy. Rob spent $44
on 2 hostas and 2 pots of ivy. What is the cost of one hosta and the cost of one pot of ivy?
Answer: Cost of one hosta = $11
Cost of one pot of ivy = $11
Step-by-step explanation:
Let the the cost of one hosta be represented by x.
Let the cost of one pot of ivy be represented by y.
The information given in the question can be formed into an equation as:
8x + 4y = 132 ............ i
2x + 2y = 44 ............. ii
Multiply equation i by 2
Multiply equation ii by 4
16x + 8y = 264 ........ iii
8x + 8y = 176 ........ iv
Subtract iv from iii
8x = 88
x = 88/8
x = 11
One hosta cost $11
From equation ii
2x + 2y = 44
2(11) + 2y = 44
22 + 2y = 44
2y = 44 - 22
2y = 22
y = 22/2
y = 11
One pot of ivy cost $11
The owner of a tree farm plants pine trees and oak trees in a ratio of 8:3. How many oak trees are planted if 264 pine trees are planted
Answer:
99 oak trees
Step-by-step explanation:
Given data
Ratio= 8:3
Number of pine tree= 264
Let the number of oak trees be x
Let us apply the part to part method
8/264= 3/x
cross multiply
264*3= 8x
792=8x
x= 792/8
x=99 oak trees
The owner of the tree farm planted 99 oak trees.
An equation is an expression used to show the relationship between two or more numbers or variables.
Given that a farmer plants pine trees and oak trees in a ratio of 8:3. If 264 pine trees are planted, let y represent the total number of trees hence:
264 = (8/11) * y
y = 363 trees
Number of oak trees = (3/11) * 363 = 99 trees
Therefore the owner of the tree farm planted 99 oak trees.
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To rent a certain meeting room, a college charges a reservation fee of $18 and an additional fee $5 of per hour. The chemistry club wants to spend at most %58 on renting the room. What are the possible numbers of hours the chemistry club could rent the meeting room? Use t for the number of hours. Write your answer as an inequality solved for t.
Answer:
You need the minimum cost for renting the meeting room given the following info
Reservation Fee = $18
Hourly Rate = $5
The renter wants to keep the cost below $58
So the cost will vary with the time, t you use the inequality below
5t + 18 ≤ 58
You can solve this to get that minimum
You can check you answer by graphing it.
I hope this helps!<3
Let c(t) be a solution to the system of differential equations: xz(t) *) z'() -52x:(t) + 22x2(t) - 110 x1(t) + 4722(t) -3 Ifr(0) [:) ] find a(t). -3 Put the eigenvalues in ascending order when you enter 31(t), xa(t) below. r(t) = exp( t)+ exp( t) 22(t) exp( t)+ exp( t)
The solution to the system of differential equations with the given initial condition is:
x₁(t) = (-6/17) × exp(-t) + (44/17) × exp(2t)
x₂(t) = (-15/17) × exp(-t) + (108/17) × exp(2t)
The system of differential equations
x₁'(t) = -52x₁(t) + 22x₂(t)
x₂'(t) = -110x₁(t) + 47x₂(t)
Let's find the solution X(t) = [x₁(t), x(t)] with the initial condition x₀ = [-3, -3].
To solve the system, we'll start by finding the eigenvalues and eigenvectors of the coefficient matrix.
The coefficient matrix of the system is
A = [[-52, 22], [-110, 47]]
To find the eigenvalues, we solve the characteristic equation det(A - λI) = 0, where I is the identity matrix
| -52 - λ 22 |
| -110 47 - λ | = 0
Expanding the determinant, we have
(-52 - λ)(47 - λ) - (-110)(22) = 0
Simplifying, we get
(λ + 1)(λ - 2) = 0
Solving this quadratic equation, we find two eigenvalues
λ₁ = -1
λ₂ = 2
Now let's find the corresponding eigenvectors for each eigenvalue.
For λ₁ = -1, we solve the equation (A - λ₁I)v = 0
| -51 22 | | v₁ | | 0 |
| -110 48 | | v₂ | = | 0 |
Simplifying, we get the equation
-51v₁ + 22v₂ = 0
-110v₁ + 48v₂ = 0
Solving this system of equations, we find the eigenvector v₁ = [2, 5].
For λ₂ = 2, we solve the equation (A - λ₂I)v = 0
| -54 22 | | v₁ | | 0 |
| -110 45 | | v₂ | = | 0 |
Simplifying, we get the equation
-54v₁ + 22v₂ = 0
-110v₁ + 45v₂ = 0
Solving this system of equations, we find the eigenvector v₂ = [11, 27].
Therefore, the eigenvalues in ascending order are
λ₁ = -1
λ₂ = 2
The corresponding eigenvectors are
v₁ = [2, 5]
v₂ = [11, 27]
To find the solution X(t), we can write it as a linear combination of the eigenvectors:
X(t) = c₁ × v₁ × exp(λ₁ × t) + c₂ × v₂ × exp(λ₂ × t)
Substituting the given values for x₁(t) and x₂(t) into the equation, we can find the coefficients c₁ and c₂:
x₁(t) = c₁ × 2 × exp(-t) + c₂ × 11 × exp(2t)
x₂(t) = c₁ × 5 × exp(-t) + c₂ × 27 × exp(2t)
Using the initial condition x₀ = [-3, -3], we can solve for c₁ and c₂
-3 = c₁ × 2 × exp(0) + c₂ × 11 × exp(0)
-3 = c₁ × 5 × exp(0) + c₂ × 27 × exp(0)
Simplifying, we get:
-3 = 2c₁ + 11c₂
-3 = 5c₁ + 27c₂
Solving this system of equations, we find
c₁ = -3/17
c₂ = 4/17
Substituting these values back into the solution equation, we have
x₁(t) = (-3/17) × 2 × exp(-t) + (4/17) × 11 × exp(2t)
x₂(t) = (-3/17) × 5 × exp(-t) + (4/17) × 27 × exp(2t)
Therefore, the solution to the system of differential equations with the given initial condition is:
x₁(t) = (-6/17) × exp(-t) + (44/17) × exp(2t)
x₂(t) = (-15/17) × exp(-t) + (108/17) × exp(2t)
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The question is incomplete the complete question is :
What is the value of 4/15 ➗ 2/3?
Answer:
2/5, option 4.
Step-by-step explanation:
When you are dividing 2 fractions, the first fraction stays the same, and the 2nd fraction becomes the reciprocal, and the division sign becomes a multiplication sign.
The reciprocal of 2/3 is 3/2.
Now you need to change the division sign to a multiplication sign.
The equation will now become 4/15 x 3/2.
4 times 3 is 12, and 15 times 2 is 30.
12/30 isn't an option, so you will need to simplify.
Find a common factor, then divide.
6 is a common factor, so you divide both 12 and 30 by 6, to get 2 and 5.
2/5 is what you are left with.
Option 4.
4/15 divided by 2/3 is 2/5.
Answer:
hi
Step-by-step explanation:
[tex] \frac{4}{15} \div \frac{2}{3} = \frac{4}{15} \times \frac{3}{2} = \frac{2}{5} [/tex]
have a nice day
Sally had some marbles. After buying 12 more marbles, she had 25 marbles. How many marbles did Sally have before she bought more?
Answer:
13
Step-by-step explanation:
25 - 12 = 13
Answer:
13
Step-by-step explanation:
12 + 13 = 25 or 25 -12 = 13
(3) Of 88 adults randomly selected from one town, 69 have health insurance.
(Q) Find the minimum sample size to obtain a margin of error of 0.04 236
The minimum sample size required is 94 to obtain a margin of error of 0.04236.
To find the minimum sample size required to obtain a margin of error of 0.04236.
we need to use the formula for sample size determination for proportions:
n = (Z² × p × (1 - p)) / E²
Where:
n = required sample size
Z = Z-score corresponding to the desired level of confidence (we'll assume a 95% confidence level, so Z ≈ 1.96)
p = estimated proportion (from the available data)
E = margin of error
Given:
Total adults in the town = 88
Adults with health insurance = 69
First, we calculate the estimated proportion (p) of adults with health insurance:
p = (69 / 88)
Next, we substitute the values into the formula and solve for n:
n = (1.96² × (69/88) × (1 - 69/88)) / (0.04236²)
n = 93.966
The minimum sample size required is 94 to obtain a margin of error of 0.04236 (or 4.236%).
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WILL GIVE BRAINLIST FOR THE RIGHT ANSWER
plz explain how he got it wrong
Answer: A. Bruno accidentally used the diameter instead of the radius to find the area of the base. B. The correct volume is 602.88
Step-by-step explanation: Area of a cylinder is (r^2)(pi)(h) not (d^2)(pi)(h)
What is the value of -92 – 10+ + + 2(145 – 7)?
не
d
ard
Answer:
-92 - 10 + 2(145 - 7) + 174
Step-by-step explanation:
In ΔMNO, the measure of ∠O=90°, the measure of ∠M=13°, and OM = 9.6 feet. Find the length of MN to the nearest tenth of a foot.
Answer: the answer is 9.9
Step-by-step explanation:
Clarissa has a budget of $1,200 a month to spend for rent and food. She has already spent $928 this month. Which inequality represents the amount she can still spend this month and remain within her budget?
plz plz
Let X=Zthe set of inters and Int.A be the set of all singletons of X tben A)- LA PIX) d) None of the shove d b a c
Since option b correctly represents the set LA as the set of all singletons of X, and the other options are incorrect, the correct answer is option d.
Let's break down the given options:
a) LA = {∅}:
This option represents the set LA, which is the set of all singletons of X. A singleton is a set that contains only one element. Since X is the set of integers, a singleton of X would be a set containing a single integer. However, the notation LA suggests that the singletons are related to the set A, not X. Therefore, option a is not correct.
b) LA = {{a} | a ∈ X}:
This option represents the set LA, which is the set of all singletons of X. Here, the notation {{a} | a ∈ X} denotes the set of all sets that contain a single element, where that element belongs to X. In other words, LA is the set of all possible singletons of X. This option correctly represents the set LA, so option b is correct.
c) LA = {∅, {X}}:
This option represents the set LA as a set containing two elements: the empty set (∅) and the set {X}. However, this representation does not align with the definition of LA as the set of singletons of X. The set LA should only contain sets with a single element, not the empty set or the set {X}. Therefore, option c is not correct.
d) None of the above:
Since option b correctly represents the set LA as the set of all singletons of X, and the other options are incorrect, the correct answer is option d.
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S is between D and P
Answer:
Question?
Step-by-step explanation:
What is the question?
Solve 2x2 + x − 4 = 0
Answer:
x = 0
Step-by-step explanation:
hi there!
im not sure if the x between the 2's is a x as in a variable or if it is multiplication sign. im going to solve the problem as if it is a multiplication sign but if that is wrong then please let me know!
2 * 2 + x - 4 = 0
is our equation that we are working with ^
first step is, following the pemdas we multiply *2 with its self
( ^ parentheses, exponents, multiplication/ division making sure to solve it left to right, addition and subtraction still making sure to follow the left to right rule )
2 * 2 + x - 4 = 0
2 * 2
= 4 + x - 4 + 0
then we add positive 4 and negative 4 together, canceling eachother out the giving us the answer of x = 0
4 + x - 4 + 0
4 + - 4 = 0
x = 0
i hope this helps you! have a good rest of your day :)
15 POINTS! PLEASE HELP!
To measure the distance across a wide river surveyors use a technique of measuring angles to a fixed point on the other side of the river. In the diagram below, a survey starts a point A and find m
Answer:
DC = 1332.95 feet
Step-by-step explanation:
From the figure attached,
Let the measure of DC = h ft
And measure of side BC = a ft
By applying tangent ratio in ΔBCD,
tan(56°) = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
= [tex]\frac{DC}{BC}[/tex]
= [tex]\frac{h}{a}[/tex]
h = a[tan(56°)] --------(1)
By applying tangent rule in ΔACD,
tan(22°) = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
tan(22°) = [tex]\frac{DC}{BC+AC}[/tex]
= [tex]\frac{h}{a+2400}[/tex]
h = (a + 2400)tan(22°) ------- (2)
Equating the values of h from equations (1) and (2),
a[tan(56°)] = (a + 2400)tan(22°)
a[tan(56°) - tan(22°)] = 2400[tan(22°)]
1.0785a = 968.6629
a = 899.085 ft
From equation (1),
h = 899.085[tan(56°)]
h = 1332.948
h ≈ 1332.95 ft
A cook at a restaurant is planning her food order. She expects to use 115 pounds of potatoes each day for 2 days. How many pounds of potatoes will she order
Answer:
just do 115 for 2 days come to 230
Answer:
230 pounds
Step-by-step explanation:
Since it is for 2 days, 115(2)
which gives u 230
imagine that we rolled a fair, 6-sided die 1000 times.out of 1,000 rolls, how many times do you think the die would come up even (2,4, or
When we rolled a fair, 6-sided die 1000 times. out of 1,000 rolls, the actual number of even rolls may vary due to the inherent randomness of the process.
If we assume that the die is fair and unbiased, each of the six sides has an equal probability of landing face-up. Since we are interested in the number of times the die comes up even (2, 4, or 6), we need to consider that half of the possible outcomes are even numbers.
Out of the six possible outcomes (1, 2, 3, 4, 5, 6), three are even (2, 4, 6). Therefore, the probability of rolling an even number on a fair six-sided die is 3/6 or 1/2.
If we roll the die 1000 times, we can expect that the die would come up even approximately half of the time, as per the probability. Half of 1000 is 500, so we would expect the die to come up even around 500 times out of 1000 rolls.
It's important to note that this is an expected value based on probability, and in practice, the actual number of even rolls may vary due to the inherent randomness of the process.
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Let U=(1, 2, 3, 4, 5, 6, 7, 8), A={1, 2, 3, 6), and B=(3, 4, 5). Find the set An B. ANB=
The set A ∩ B = {3}
The intersection of sets, denoted as A ∩ B, refers to the set that contains elements that are common to both sets A and B. In this case, set A consists of the elements {1, 2, 3, 6}, and set B consists of the elements {3, 4, 5}.
The intersection of A and B, written as A ∩ B, represents the set of elements that appear in both sets simultaneously.
To find the intersection of sets A and B, we examine each element of set A and check if it is also present in set B. In this case, the element 3 is the only element that exists in both sets.
Therefore, the intersection of sets A and B is {3}.
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sketch a graph of f(t), express the function f(t) in terms of the heaviside function u(t −a), and find the laplace transform l{f(t)}.
(a) f(t) = {sint 0 ≤ t < π {0 π ≤ t
(b) f(t) = {0 0 ≤ t <3
{t² 3 ≤ t
(a) To sketch the graph of f(t) = {sin(t) 0 ≤ t < π, 0 π ≤ t}, we can observe that the function is equal to zero for t greater than or equal to π. Thus, the graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards.
(b) To express f(t) in terms of the Heaviside function u(t - a), we can write f(t) as {0 0 ≤ t < 3, t² 3 ≤ t}. This means that for t less than 3, the function is zero, and for t greater than or equal to 3, the function is t squared. We can rewrite this using the Heaviside function as f(t) = t²u(t - 3).
To find the Laplace transform L{f(t)}, we can apply the Laplace transform to each part of the function separately. Using the Laplace transform properties, we have L{f(t)} = L{t²u(t - 3)}. By applying the time-shifting property, the Laplace transform of t²u(t - 3) is given by L{t²u(t - 3)} = e^(3s)/s^3, where s represents the Laplace variable.
The graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards. The function f(t) can be expressed as f(t) = t²u(t - 3) using the Heaviside function. The Laplace transform of f(t) is L{f(t)} = e^(3s)/s^3.
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One boss decided to increase the salary of an employee by 5%. How much will he get if his salary was $2000?
Answer:
$2100 will be his new salary
Step-by-step explanation:
Well since a 5 percent raise is basically 105% of his pay, we can multiply 105% with 2000
since its a percent in decimal form its 1.05
1.05*2000=2100
$2100 is his new salary
According to the latest real estate report from a suburban town, the mean number of home purchases during last quarter was 175 homes with a population standard deviation of 6 homes. A real estate agent believes that the recent increase of mortgage interest rates is causing a decline in home purchases. To test this, the real estate agent randomly selects 60 recent home purchases. What is the probability that the mean of this sample of home purchases is between 173 and 174 homes
Answer:
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936
Step-by-step explanation:
Step(i):-
Given that the mean of the Population = 175
Given that the standard deviation of the Population = 6
Let 'x⁻' be the mean of the random sample
Given that x₁⁻ = 173
[tex]Z_{1} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{173-175}{\frac{6}{\sqrt{60} } } =-2.58[/tex]
Given that x₂⁻ = 174
[tex]Z_{2} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{174-175}{\frac{6}{\sqrt{60} } } = -1.29[/tex]
Step(ii):-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(X₁≤X≤X₂) = P(Z₁≤Z≤Z₂)
= P(Z≤Z₂) - P(Z≤Z₂) ( both values 'Z' values are negative)
= 0.5 -A(Z₁) - (0.5 -A(Z₂))
= |A(Z₂) -A(Z₁)|
P(173≤X≤174) = | A(2.58)-A(1.29)|
= 0.4951 - 0.4015 (∵ from normal table)
= 0.0936
Final answer:-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936