What percent of the volunteers was at least 15 years old but no more than 24 years old?
2 answers:
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Here are some simple equations that can be a life saver with this stuff :
vol of a sphere =
Circumference =
sorry this might not be very helpful. I haven't don't this since last year. You basically have to work backwards. so plug in 972 for V and then do (3/4)×3.14.
then take the answer u got for ^^ and divide it by 2? not sure.