Question

please tell me the answer​

Answer 1

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12.

r = 7cm

Volume of sphere =

$\frac{4}{3} \pi {r}^{2} \\ \frac{4}{3} \times \frac{22}{7} \times 7 \times 7 \\ \frac{4}{3} \times 22 \times 7 \\ \frac{616}{3} {cm}^{2} \\ 205.33 \: {cm}^{2}$

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13.

a = 10

d = 6 - 10 = --4

n = 10

a10 = a + (n-1)d

a10 = 10 + 9(-4)

a10 = 10 - 36

a10 = -- 26

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Hope it helps u!!