A large spherical balloon is being deflated. When the radius of the balloon decreases from 10 ft to 5 ft, approximately how much volume has it lost?

Question

pfenn1 · Answer

Do you know the formula for the volume of a sphere?

anonymous · Answer

Yo gurl, how big is the 10 foot beach ball? Sweet thang, how big is the 5 foot beach ball?

anonymous · Answer

well yes, 4/3n (pi)r^3 

i plugged 10 and 5 into it and tried to calc the difference and it didnt work out for me

anonymous · Answer

ee i got the formula wrong, let me try once more

anonymous · Answer

hmmm, what happened exactly? and your formula should be:
(4/3)pi*r^3
not (4/3)n(pi)r^3
because I don't know what n would be anyhow...

anonymous · Answer

yeah i had to many numbers in my head at that time, lol

anonymous · Answer

got it, 3665ft^3