What is the best approximation of the volume of the sphere?

Do i get charged for my membership before or after the 6 months

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.