MATHEMATICS COLLEGE

Which of the following statements are equivalent to the ratio 10:3? Choose all that apply-(5 points)
A. 28 days to 6 days
B. 120 meters to 8,000 meters
C. 2,000 pounds to 600 pounds
D. 300 seconds to 20 seconds
E. 250 cents to 75 cents
Need answer ASAP please

Answers

Answer 1
Answer: Answer:
C and E would be your answers
Explanation:
C is correct because If you multiple 10 by 200 you get 2,000 and then do 3 times 200 gets 600.
E is correct because if you do 10 x 25 it become 250 and if you do 3 x 25 it equals 75!!
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So sorry if I am wrong!!

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The advertising department of a nationally circulated magazine wishes to estimate the mean age of.its subscribers to within 0.5 year with 90% confidence. if they estimate that the standard deviation of the ages of their subscribers is 5 years, find the required sample size.a. 165
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Answers

The correct answer is C) 271.

We first find the z-score associated with this confidence interval:
Convert 90% to a decimal:  90/100 = 0.9
Subtract from 1: 1 - 0.9 = 0.1
Divide by 2:  0.1/2 = 0.05
Subtract from 1:  1 - 0.05 = 0.95

Looking this value up in a z-table, we see that this number is the same distance from 1.64 and 1.65; therefore we will use 1.645.

Now we will use the following formula to calculate the sample size required:
n=((z_(\alpha/2)*\sigma)/(E))^2\n\n=((1.645*5)/(0.5))^2=270.6\approx 271

A square has sides of 16 units. Squares x + 1 by x + 1 units are cut out of each corner, and then the sides are folded up to create an open box. Express the volume V of the box as a function in terms of x. V(x)=

Answers

A distance of (x+1) is cut in from both sides, so the base dimensions are

... 16 -2(x+1) = 14-2x

The depth of the fold is (x+1), so that is the depth of the box.

The volume is ...

... V(x) = (x+1)(14 -2x)²

Which EXPRESION has the greatest value when x=3

Answers

What is the options to answer

Answer: 2x^3+5

Step-by-step explanation:

What is f ( 1/3)? When the function is f(x) =-3x+7

Answers

Answer:

f(1/3) = 6

Step-by-step explanation:

f(x) =-3x+7

Let x = 1/3

f(1/3) =-3*1/3+7

        = -1 +7

       = 6

Answer:

f(1/3) = 6

Step-by-step explanation:

The function is:

● f(x) = -3x+7

Replace x by 1/3 to khow the value of f(1/3)

● f(1/3) = -3×(1/3) +7 = -1 +7 = 6

Which number is closest to the square root of 84 ?

Answers

The answer is 9 . Nine squared is 81 . Ten squared is 100. 81 is closer to 84, than 100 is

Find the missing coefficient. (5d − 7)(5d − 6) = 25d2 ++ 42 5 65 –5 –65

Answers

Answer:

-65d

Step-by-step explanation:

(5d − 7)(5d − 6)

(5d - 7)(5d - 6)

Multiply it using FOIL method to find the missing term

Multiply 5d inside the second parenthesis and then multiply -7 inside second parenthesis

5d \cdot 5d= 25d^2

5d \cdot -6= -30d^2

-7 \cdot 5d=-35d

-7 \cdot -6=42

Now write all the terms together

25d^2-30d-35d+42

Combine like terms

25d^2-65d+42

HEre -65d is missing
i do believe it is -65d because the equation will look like this in the end
-65d=-65d.
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