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3 years ago

HELP PLEASEEE!!!!! SCHOOL START TOMORROW. NUMBER 21 and 22 ONLY

Mathematics

1 answer:

Snezhnost [94]3 years ago

4 0

Answer:

21. $\sqrt{\frac{-s}{15} }$

22. 87.92

Step-by-step explanation:

21. The quotient means division is going to happen between -s and 15. And then take the square root of that.

$\sqrt{\frac{-s}{15} }$

22. The equation for the volume of a cylinder is this:

$\pi r^{2} h$

The question gives you values for r, and h, so just substitute those values into the equation.

Here is the work:

$\pi r^{2} h\\\\=\pi 2^{2} (7)\\\\=\pi(4)(7)\\\\=\pi (28)$

They told us to use 3.14 for pi, so i will substitute pi with 3.14

$\pi (28)\\\\=3.14(28)\\\\=87.92$

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