The mean cost for all 5 computer keyboards is $12.80.
The mean cost, also known as the average cost, is a measure of central tendency that represents the typical or average cost of a set of values
To find the mean cost of all 5 computer keyboards, we need to calculate the total cost of all 5 keyboards and then divide by the total number of keyboards.
The total cost of the first 4 keyboards is
= 4 keyboards x $12 each
Multiply the numbers
= $48
The total cost of all 5 keyboards is
= $48 + $16
Add the numbers
= $64
The mean cost of all 5 keyboards is
= $64 / 5 keyboards
Divide the numbers
= $12.80
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Determine which property(s) the following relation R on the set of all integers satisfy(s)?( a , b ) ∈ R iff a b ≥ 1 .
In conclusion, the relation R on the set of all integers satisfies reflexivity and symmetry but not transitivity.
To determine which properties the relation R on the set of all integers satisfy, we need to check for reflexivity, symmetry, and transitivity.
1. Reflexivity: A relation R is reflexive if for every element a in the set, (a, a) ∈ R.
In this case, we need to check if a * a ≥ 1 for all integers a.
Since any integer squared (a * a) is greater than or equal to 1, R is reflexive.
2. Symmetry: A relation R is symmetric if for every pair (a, b) ∈ R, (b, a) also ∈ R.
In this case, we need to check if a * b ≥ 1 implies b * a ≥ 1.
Since multiplication is commutative (a * b = b * a), the condition holds true, and R is symmetric.
3. Transitivity: A relation R is transitive if for every (a, b) ∈ R and (b, c) ∈ R, (a, c) also ∈ R.
In this case, we need to check if a * b ≥ 1 and b * c ≥ 1 imply a * c ≥ 1.
Let's take the counterexample: a = -1, b = 2, and c = -1. We have -1 * 2 ≥ 1 and 2 * -1 ≥ 1, but -1 * -1 ≥ 1 is false.
Therefore, R is not transitive.
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a doctor prescribes 3 g of a drug, daily, for a patient. the pharmacist has only 750 mg tablets available. how many tablets will the patient take daily?
The patient needs to take 4 tablets daily to receive the prescribed dose of 3 grams of the drug.
To determine how many tablets the patient needs to take daily, we need to divide the total amount of the drug prescribed by the dose of each tablet.
Since the patient is prescribed 3 grams of the drug daily, we first need to convert this to milligrams (mg), as the tablets are available in milligram form.
1 gram = 1000 milligrams, so 3 grams = 3,000 milligrams
The pharmacist has 750 mg tablets available, so we can calculate the number of tablets the patient needs to take daily by dividing the prescribed dose by the dose of each tablet:
Number of tablets = Prescribed dose ÷ Dose per tablet
Number of tablets = 3,000 mg ÷ 750 mg
Number of tablets = 4
Therefore, the patient needs to take 4 tablets daily to receive the prescribed dose of 3 grams of the drug.
Therefore, the patient will take 4 tablets daily.
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QUIZ:
Square Roots and Cube Roots to Solve Equations
Question
The volume of a cube can be found using the equation V = s³, where V is the volume and s is the measure of one side of the cube.
Match the equation for how to solve for the side length of a cube to its description.
Drag the equation to the box to match the description.
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
A cube has a volume of 2560 in³.
Answer:
Step-by-step explanation:
2560
stemjock in each of problems 18 through 22, use the method of reduction of order to find a second solution of
Using the method of reduction of order, you can find a second solution to Problems 18-22.
In this method, we assume the second solution will have the same form as the first one, but with different constants of integration. To find the second solution, we substitute the first solution into the differential equation and solve for the remaining constant.
To illustrate, let's say Problem 18 is:
$$y''-2y'+y = 0$$
We start with a first solution of the form: $y_1=e^rx$.
Substituting this into the differential equation, we get:
$$r^2e^rx -2re^rx+e^rx=0$$
Rearranging and dividing by $e^rx$ yields:
$$r^2 -2r+1=0$$
Using the quadratic formula, we find two possible solutions for $r$:
$r=1$ and $r=-1$
Using these two values for $r$, we can write our two solutions as:
$y_1 = e^x$ and $y_2 = e^{-x}$
This same method can be applied to Problems 19-22 to find the second solution.
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The expected value of the number of points for one roll is:_____.a. 0 b. 1 c. 3 d. 6
Answer:
2023- answer is A-0
Step-by-step explanation:
a number is equal to . what is the smallest positive integer such that the product is a perfect cube?
The smallest positive integer y such that the product xy is a perfect cube is 3.
To find the value of y, we need to factorize x, which is 7 * 24 * 48.
We can then find the prime factorization of xy, which will help us determine the smallest integer y that will make the product a perfect cube.
Since 7, 24, and 48 are already factored, we can express x as:
x = 2⁴ * 3 * 7²
To make xy a perfect cube, we need to ensure that the exponents of all the prime factors are multiples of 3.
Therefore, we need to add a factor of 3 to the exponent of 2 in x to make it a multiple of 3. This gives us:
xy = 2⁷ * 3² * 7²
The smallest integer y that can make this product a perfect cube is 3, because we need to add a factor of 1 to the exponent of 2 in xy to make it a multiple of 3, and the smallest integer that can achieve this is 3.
Thus, the smallest positive integer y such that the product xy is a perfect cube is 3.
The question is: A number x is equal to [tex]$7\cdot24\cdot48$[/tex]. What is the smallest positive integer y such that the product xy is a perfect cube
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Peter bought 100 shares of stock for $6.35 per share last year. He paid his broker a 2% commission. He sold the stock this week for $12.57 per share and paid his broker a $15 flat fee. What were Luis’s net proceeds?
The net proceeds for Luis would be amount $1,169.50. This is calculated by subtracting the cost of the stock (100 x $6.35 = $635) and the commission (2% of $635 = $12.70) from the sale of the stock (100 x $12.57 = $1,257) and subtracting the flat fee of $15. ($1,257 - $635 - $12.70 - $15 = $1,169.50).
The net proceeds for Luis from the sale of the stock were calculated by subtracting the cost of the stock, the commission fee, and the flat fee from the proceeds of the sale. The cost of the stock was 100 shares at $6.35 per share, which totaled amount $635. The commission fee was 2% of the cost of the stock, which was $12.70. The flat fee was a set fee of $15. The proceeds from the sale of the stock was 100 shares at $12.57 per share, which totaled $1,257. The net proceeds for Luis was calculated by subtracting the cost of the stock, the commission fee, and the flat fee from the proceeds of the sale, which was $1,257 - $635 - $12.70 - $15 = $1,169.50.
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i need help with my home work
The expression or equation that correctly represents the situation given is y = 2x.
What is the relationship between the packages of cashews and the cans of peanuts?Based on the table, for each package of cashews 2 cans of peanuts are required. Here are some examples:
3 packages of cashews = 6 cans of peanuts = 6/3 = 24 packages of cashews = 8 cans of peanuts = 8/4 = 2Based on this relationship and assuming y represents the cans of peanuts and x represents the packages of cashews a possible equation to represent this situation would be y = 2x.
Note: This question is incomplete; below I attach the missing information:
Write an equation to represent this relationship:
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Gary, Nancy, and Jamal are trying to write an inequality where all values in the set of numbers below make the inequality true. {0, 1, 3, 4, 6, 12} Consider their inequalities. Gary: 6>0.5t Nancy: 30−t≤18 Jamal: 12≤t+12 Which student(s) wrote an inequality that is true for all values in the set of numbers? Select your answer from the drop-down list.
Therefore , the solution of the given problem of inequality comes out to be Gary and Jamal are the students who created an inequality that holds true for all values in the collection "0, 1, 3, 4, 6, 12".
An inequality is what?Algebra does not have an equal symbol, but a partner or group of integers can be used to represent the difference. Equilibrium is typically followed by equity. Inequality comes from the continued divergence of ideals. Disparity and expression fairness are not identical. Despite the fact that the parts are typically not connected or close to one another, that was our most popular symbol. (). Any difference, no matter how small, can be used to determine worth.
Here,
We can test each inequality with each value in the set, 0 through 1, 3, 4, 6, and 12, to identify which inequality holds true for all values.
6 > 0.5t, where t is a member of the collection, is Gary's inequality. When we compare each value in the collection to this inequality, we discover:
When t = 6: 6 > 0.5(6) is true
When t = 12: 6 > 0.5(12) is true
Therefore, for each value in the collection, Gary's inequality holds true.
30 - t 18 is Nancy's inequality, where t is a number from the collection. When we compare each value in the collection to this inequality, we discover:
When t = 6: 30 - 6 ≤ 18 is true
When t = 12: 30 - 12 ≤ 18 is true
Therefore, not all values in the collection satisfy Nancy's inequality.
Gary and Jamal are the students who created an inequality that holds true for all values in the collection "0, 1, 3, 4, 6, 12".
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Please help I’ll give brainliest
The standard form is 5x²-2x-4=0
A quadratic equation can be written in other forms.
Standard Form: ax²+bx+c=0
Vertex Form: a (x - h)2 + k = 0
Intercept Form: a (x - p)(x - q) = 0
This equation is called 'quadratic' as its degree is 2
The standard form of a quadratic equation is also known as its general form.
ax²+bx+c=0
with the conditions : a ≠ 0, and a, b, and c are real numbers
'a' is the coefficient of x²
'b' is the coefficient of x
'c' is the constant
here a= 5 b= -2 c= -4
Shift all the terms to one side and write in standard quadratic equations
=> 5x²-2x+1-5=0
=> 5x²-2x-4=0
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i need help pleaseeeeeee
By using the definition of inverse functions we can see that:
a) g(7) = -10
b)(-10,7) is a point on h(x).
c)(7, -10) is a point on j(x)
How to evaluate the functions?Remember that if two functions f(x) and g(x) are inverses, then:
f(y) = x
g(x) = y
And also g(f(x)) = x = g(f(x)).
Here we know that functions h(x) and j(x) are inverses, and we also know that:
h(-10) = 7
So for the input -10, we have the output 7.
Then, by using the relation written above, we know that for the inverse function we must have:
j(7) = -10
That is the answer for a.
And for b and c the notation is (input, output), then:
(-10, 7) is a point on h.(7, -10)is a point on jThese are the answers of points B and C of the question.
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The function g(x) is shown on the graph.
The graph shows an upward opening parabola with a vertex at negative 3 comma negative 2, a point at negative 5 comma 2, and a point at negative 1 comma 2.
What is the equation of g(x) in vertex form?
g(x) = (x − 3)2 − 2
g(x) = (x − 3)2 + 2
g(x) = (x + 3)2 − 2
g(x) = (x + 3)2 + 2
Answer:
g(x) = (x + 3)2 - 2
Step-by-step explanation:
I think that's the one I just did this class so
1)
The Polynomial Remainder Theorem states that if P(x) is divided by x-a, then the
remainder is equal to P(a). Given: 2x³ + 5x²-12x+9+x-3. Look at the divisor and
determine the value for "a". Evaluate P(a) and find the remainder.
The value for a is 1 and the remainder when P(x) is divided by x - 1 is 2.
What is polynomial remainder theorem?
It states that the remainder of the division of a polynomial f(x) by a linear polynomial x-r is equal to f(r).
The divisor in this case is x - a, where "a" is the value we need to determine.
We can see that the given polynomial 2x³ + 5x² - 12x + 9 + x - 3 has a term of x in addition to the other terms. This means that the divisor must also have a term of x in it.
So, we can write the divisor as x - a and set x - a = 0 to solve for "a":
x - a = 0
=> x = a
Therefore, "a" must be equal to 1 since there is a term of x in the polynomial.
To find the remainder, we need to evaluate P(a) where P(x) = 2x³ + 5x² - 12x + 9 + x - 3 and a = 1.
P(a) = 2(1)³ + 5(1)² - 12(1) + 9 + (1) - 3 = 2 + 5 - 12 + 9 + 1 - 3 = 2
So, the remainder when P(x) is divided by x - 1 is 2.
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If a tv is £800 plus 20% vat Whats the total cost of the telly
Number of Years Since Last Census, X Estimated Population, f(x) 42,458 2 41,776 3 40,654 4 39,841 An exponential function would better model the data because as x increases, the y values change multiplicatively. The common ratio/multiplier/base of this function is approximately V
The common ratio/multiplier/base of the exponential function that better models the given data is approximately 1.123.
What is expression ?
In mathematics, an expression is a combination of numbers, variables, and mathematical operations (such as addition, subtraction, multiplication, division, exponents, and roots) that can be evaluated or simplified to obtain a numerical value or another expression.
To find the common ratio/multiplier/base of the exponential function that better models the given data, we need to use the formula for exponential functions:
[tex]f(x) = ab^x[/tex]
where a is the initial value and b is the common ratio/multiplier/base.
We can use the given data points to form a system of equations:
[tex]2 = ab^{(42,458)}\\ \\3 = ab^{(41,776)}\\ \\4 = ab^{(40,654)}\\ \\5 = ab^{(39,841)}\\ \\[/tex]
We can divide each equation by the previous equation to eliminate "a" and obtain a ratio of "b" values:
[tex]b^{(42,458-41,776)} = 3/2\\ \\ b^{(41,776-40,654)} = 4/3\\ \\ b^{(40,654-39,841)} = 5/4\\ \\[/tex]
Simplifying each exponent, we get:
[tex]b^{682} = 3/2\\ \\b^{1122} = 4/3\\ \\b^{813} = 5/4\\ \\[/tex]
Taking the cube root of the first equation, the fourth root of the second equation, and the fifth root of the third equation, we get:
[tex]b^{(682/3)} = (3/2)^{(1/3)} = 1.245\\ \\ b^{(1122/4)} = (4/3)^{(1/4)} = 1.090\\ \\ b^{(813/5)} = (5/4)^{(1/5)} = 1.035\\ \\[/tex]
Taking the average of these values, we get:
b ≈ (1.245 + 1.090 + 1.035) / 3 ≈ 1.123
Therefore, the common ratio/multiplier/base of the exponential function that better models the given data is approximately 1.123.
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QUESTION 8
In the figure to the right, AB is parallel to CD.
What is the value of m?
A. 7°
B. 44°
C. 46°
D. 49°
Answer: B. 44°
if i'm wrong then its C
Please help with 18! :)
Answer:
x = -13
Step-by-step explanation:
x+[tex]\frac{x+2}{3}[/tex]=-8
Step 1- You multiply both sides by 3
x + x + 2= -24
2x + 2 = -24
Step 2- You then minus 2 from both sides
2x = -26
Lastly, you divide both sides by 2
x = -13
And there you go!
Viola
Hope this helped
A $12 box of chocolate on sale for 20% off. What is the sale price
A box of chocolate on sale for 20% means that 80% of its original value remain.
Therefore, the sale price of the box of chocolate = $12 x 80% = $9.6
The sales price of box of chocolates is 9.6 dollars.
Given that, a $12 box of chocolate on sale for 20% off.
A sale price is the discounted price at which goods or services are being sold.
Here, sales price = Original price - 20% of Original price
= 12 - 20% of 12
= 12 - 20/100 ×12
= 12 - 0.2×12
= 12 - 2.4
= $9.6
Therefore, the sales price of box of chocolates is 9.6 dollars.
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Which situation can be represented by −10? A. a debt of $10 B. a temperature of 10°F C. a score of 10 in a soccer game D. an elevator that is on the 10th floor
Answer:
A debt of $10.
Step-by-step explanation:
A. If you have debt it means your supposed to give money back to someone. You could be low on money. THIS IS THE CORRECT ANSWER!
Here's why IT'S NOT the others.
B. Am pretty sure 10*F might seem cold. But isn't it equal to 50*F. Plus 10*F is above 0!
C. It's not -10 it's just 10. you can't score -10 in a game unless you broke a rule or smthing.
D. 10 floor in a building. It's not a underground building so it's not -10.
Have a nice day!
Your welcome!
Given the data below, which of the following statements correctly describes the relation of the point,(2,2),to the line of best fit?
The point (2,2) may be considered an anomaly and should be investigated further to determine if it is a valid data point or if it should be excluded from the analysis.
The relation of the point (2,2) to the line of best fit can be determined by analyzing the residual value of this point. The residual value is the difference between the actual y-value and the predicted y-value based on the line of best fit. If the residual value is close to zero, then the point lies on the line of best fit. If the residual value is positive, then the actual y-value is higher than the predicted y-value, and if the residual value is negative, then the actual y-value is lower than the predicted y-value.
Unfortunately, the data necessary to determine the residual value of the point (2,2) is not provided in the question. Therefore, it is impossible to determine the exact relation of this point to the line of best fit.
However, we can make some generalizations based on the location of the point relative to the trend of the data.
If the point (2,2) lies close to the line of best fit, with a residual value close to zero, then it can be said that the point follows the trend of the data and is a typical data point. However, if the point lies far away from the line of best fit, with a large positive or negative residual value, then it can be said that the point is an outlier and does not follow the trend of the data.
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A one-to-one function is given. Write an expression for the inverse function. f(x)=√x+7 Select one: O af¹¹(x)=x²-7 Ob. f¹(x)=(x-7)³ O c.f¹(x) = (x + 7)³ O d. f¹(x)=x³ +7
The correct option B. The expression for the inverse is f¹(x) = (x - 7)².
A one-to-one function is given. We have to write an expression for the inverse function.
Given function: f(x)=√x+7
The inverse of a function is found by switching the x and y coordinates and solving for y.
So, the expression for the inverse function will be:
f¹(x) = y = √x + 7 ... (1)
Replace x with y and simplify to isolate y from the radical.
y = √x + 7
=> y - 7 = √x
=> (y - 7)² = x
Hence, the inverse of the given function is given byf¹(x) = (x - 7)².
So, the correct option is B) f¹(x)=(x-7)².
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Nhan is getting dressed. He considers two different shirts, three pairs of pants, and three pairs of shoes. He chooses one of each of the articles at random. What is the probability that he will wear his jeans but not his sneakers?
Shirt
Pants
Shoes
collared
khakis
sneakers
T-shirt
jeans
flip-flops
shorts
sandals
the sum of shannon and john’s ages is 70 shannon is 4 times as old as john
Hannah put 2,364 pieces of candy into a bags with 57 pieces of candy each. How many full bags did she make?
2,364 ÷ 57 ≈ 41. Therefore, Hannah made 41 full bags of candy.
To solve this problem, we use integer division to find the number of full bags Hannah made. We divide the total number of candy pieces by the number of pieces in each bag and take the integer part of the result. This is because we are only interested in the number of full bags, not partial bags. In this case, we have 2,364 pieces of candy and each bag holds 57 pieces, so 2,364 ÷ 57 ≈ 41. This means that Hannah made 41 full bags of candy.
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Evaluate. 547+233×5−142 whats this anwser?
The answer is 1570. To evaluate the expression 547+233×5−142, we need to follow the order of operations, which is PEMDAS (parentheses, exponents, multiplication and division, and addition and subtraction).
There are no parentheses or exponents, so we start with multiplication and division from left to right.
233×5 = 1165
Then, we can simplify the expression to:
547 + 1165 - 142
Next, we add and subtract from left to right:
547 + 1165 = 1712
1712 - 142 = 1570
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|
Which expression is equivalent to √36x6 z2
x>0, and z> 0 ?
O 6x4
O 6x³ z
O 18x4
O 18x³ z
N
>
3
when
Finish
The expression √36x^6 z² can be simplified. The expression is equivalent to 6x³z.
What is simplified expression?A simplified expression is an algebraic expression that has been reduced or simplified as much as possible using various mathematical operations, such as combining like terms, factoring, or cancelling common factors.
According to question:The expression √36x^6 z² can be simplified using the properties of square roots as follows:
√36x^6 z² = √(36) √(x^6) √(z²)
Since 36 is a perfect square and x^6 and z² are perfect squares (since x and z are both greater than 0), we can simplify further as:
√36x^6 z² = 6x³ z
So the expression is equivalent to 6x³z.
Therefore, the correct answer is option B: 6x³z.
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John has a jar filled with juice. After he poured 350 ml of juice in each 8
glasses he was still left with 200 ml juice in the jar. What was the capacity
of jar in liters?
Answer:
Step-by-step explanation:
If there were 8 glasses of juice, and 350 ml was poured into each glass, then the total amount of juice poured into the glasses would be 8 x 350 = 2800 ml.
After pouring this much juice, John was still left with 200 ml juice in the jar.
Therefore, the capacity of the jar would be the total amount of juice poured into the glasses plus the amount remaining in the jar, which is 2800 ml + 200 ml = 3000 ml.
To convert this volume to liters, we can divide by 1000. Therefore, the capacity of the jar in liters would be 3000 ml / 1000 = 3 liters.
So, the capacity of the jar is 3 liters.
Jen's total assets are $6,964. Her liabilities are $1,670 in credit card debt and $3,642 for a student loan. What is her net worth?
Responses
$1,652
$1,652
$6,964
$6,964
$5,312
$5,312
$12,276
$12,276
Answer: $1,652.
Step-by-step explanation:
To calculate Jen's net worth, we need to subtract her liabilities from her total assets:
Net worth = Total assets - Liabilities
In this case, Jen's total assets are $6,964, and her liabilities are $1,670 for credit card debt and $3,642 for a student loan. So:
Net worth = $6,964 - $1,670 - $3,642
Net worth = $1,652
Therefore, Jen's net worth is $1,652. Answer: $1,652.
what polynomial has a graph that passes through the given points? (-4,89),(-3,7),(-1,-1),(1,-1),(4,329)
The polynomial (D) y = x4 + 2x3 – 3x2 – 2x + 1 has the graph that passes through the points (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329) respectively.
What is a polynomial?A polynomial is a mathematical statement made up of coefficients and indeterminates that uses only the operations addition, subtraction, multiplication, and powers of positive integers of the variables.
A polynomial is a mathematical equation that solely uses the operations addition, subtraction, multiplication, and non-negative integer exponentiation of variables.
Variables are sometimes known as indeterminates in mathematics.
x² 4x + 7 is an illustration of a polynomial with a single indeterminate x.
So, substitution and trial-and-error are the best ways to solve this problem given the various points and equations that are available as options.
In this regard, we change the equations' examples from 4 to x and see which one produces 89. The solution is D.
Therefore, the polynomial (D) y = x4 + 2x3 – 3x2 – 2x + 1 has the graph that passes through the points (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329) respectively.
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Complete question:
What polynomial has a graph that passes through the given points? (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329)
a)y = 2x3 – 3x2 – 2x + 1
b)y = 1x4 – 2x3 – 3x2 + 2x + 1
c)y = x4 – 2x3 + 3x2 + 2x – 1.
d)y = x4 + 2x3 – 3x2 – 2x + 1
Question
Find the surface area of the prism
HELP
Answer: 56 in
Step-by-step explanation:
4x7x2=56
Answer:
56 in
Step-by-step explanation:
4*7*2