5. What is the approximate radius of a sphere whose volume is 1,349 cm³?

Question

5.   What is the approximate radius of a sphere whose volume is 1,349 cm³?

anonymous · Answer

The volume of a sphere is $$(4/3)\pi r ^{3}$$
Plugging in we get:  $$1349=(4/3)\pi r ^{3}$$
Now you just have to solve.

anonymous · Answer

so i just solve that? or do i need to get the radius first?

anonymous · Answer

Yes, just solve. You are solving for the radius aren't you? The radius will be your only unknown, so you don't need it.

anonymous · Answer

oh allright...thanks so much..so when i get to 322.1 = r^3 i just find the cube of 322.1?

anonymous · Answer

Cube root

anonymous · Answer

how do you do a cube root?

anonymous · Answer

on a calculator

anonymous · Answer

$$\sqrt[3]{322.1}$$ What type of calculator are you using?

anonymous · Answer

just a downloaded one...ill try tht

anonymous · Answer

i cant just do the square root twice?

anonymous · Answer

No, that won't work. Hold on I'll get it.

anonymous · Answer

anonymous · Answer

i figured it out...thanks so much