\pi7^(2) * 28 - \pi2.25 {}^(2) * 28

Question

`\pi7^(2) * 28 - \pi2.25 {}^(2) * 28`

Answer 1

I don't see any relationship between the expression you have shared and the volume of paper towels.

If you wish to simplify the given expression, factor out 28, obtaining
28*pi(49 - 5.0625) = 28*pi*(43.9375).

You could leave your answer as shown, or you could multiply it out. Try several forms of presentation. Which one is closest to the answer to this problem?