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andrezito [222]
2 years ago
14

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

Mathematics
1 answer:
Snezhnost [94]2 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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