Which number gets in 2 both and 3​

Asphere has a diameter of 10 in. what is the volume of the sphere?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30