a toy ball expands and contracts. When it is completely closed, it has a diameter of 15.5. Find the volume of the ball when it is completely closed. Round to the nearest cubic inch.

Question

anonymous · Answer

Volume of a sphere is $$ \frac{ 4 }{ 3 }pi*r ^{3}$$. r is half the diameter.

anonymous · Answer

yes I understand that but i keep ending up with the wrong answer.

anonymous · Answer

Is the diameter given in inches?

anonymous · Answer

yes

anonymous · Answer

I'm getting 1950 cubic inches how about you?

anonymous · Answer

197.557704

anonymous · Answer

thanks, but its wrong...

anonymous · Answer

198.

anonymous · Answer

no, it says its 1949

anonymous · Answer

It should round up to 1950 but ok

anonymous · Answer

1949.816

anonymous · Answer

since i got it wrong i have to do one similar to this one.

anonymous · Answer

same question, but its 13.5 inches for diameter

anonymous · Answer

1288.25

dumbcow · Answer

they probably said to use (22/7) or 3.14 for pi , thats why their answer is a bit smaller...thus 1949 and not 1950 when you use a longer approximation for pi