PLEASE help me answer this question

cm³

Step-by-step explanation:

The volume (V) of a sphere is calculated as

V = πr³ ( r is the radius )

Here diameter = 4 cm , hence r = 4 ÷ 2 = 2 cm

V = π × 2³ = π × 8 = cm³

Thus

combined volume = + 15π = + = cm³

i think the answer is .36

step-by-step explanation:

what i did was only 2.88 divided by 8

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.