9. Calculate the volume of a sphere that has a surface area of 200 in2 in two ways:

a) First calculate the radius of the sphere r, then substitute the radius in the formula of the volume.

b) Write one command.

5π

6

⎝------⎠

cos⎛ ⎞ 7π

8

⎝------⎠

sin2 ⎛ ⎞

π

6

⎝-- ln8⎠

tan⎛ ⎞

7 + 2

+ -------------------------

2 3π

5

⎝------⎠

cos ⎛ ⎞

πln6 5

⎝-----------⎠

tan⎛ ⎞

8 72

⋅ --

+ -------------------------

4x3 – 14x2 – 6.32x + 7.3 e 3 3 0.02 ⋅ 3.12

-----------------------------

10(x2 – x3)2 log xz

(x ⁄ z)2 --------------- + 14x2 – 0.8z2 x2z – z2x xz

⎝ -- ⎠

⎛ ⎞2 zx

⎝ -- ⎠

⎛ ⎞1 ⁄ 2

+ –

a = –18.2 b = 6.42 c = a ⁄ b d = 0.5(cb + 2a)

d a b +

c

– ------------ (a + d)

abc

----------------

2

+

ln[(c – d)(b – a)] (a + b + c + d)

(a – b – c – d)

+ -----------------------------------