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3 years ago

28÷(11-7+3)×2 how do you do this

2 answers:

7 0

You do the brackets first, 11-7=4,4+3=7 then you divide 7 by 28 which is 4. 7,14,21,28. So you now do 4x2=8 so the answer is 8.
(I checked with a calculator afterwards and I was right.)

Akimi4 [234]3 years ago

3 0

You solve the ( ) and the result is divided <span>÷ 28 times 2</span>

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Answer:

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Step-by-step explanation:

First, we use the given volume, the given height, and the formula of the volume of a cylinder to find the radius of the base. Then we use the radius of the base to find the circumference of the base.

$volume = \pi r^2 h$

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We set the formula equal to the volume and replace h with 30 in.

$\pi r^2 h = 6750 \pi~in.^3$

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Divide both sides by 30pi in.

$r^2 = 225 ~in.^2$

Take the square root of each side.

$\sqrt{r^2} = \sqrt{225 ~in.^2}$

$r = 15~in.$

The radius of the base is 15 in.

Now we use the radius of the base and the formula of the circumference of a circle to find the answer.

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Answer:

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2 years ago

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