Find f(-1) Find f(4) Find f(-3) if f(x)=9, Find x

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

Can someone me do math because i am having a breakdown rn because i don’t get it

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?