How to write 12.375 in expanded form

You have 3 boxes, one "strawberries"; one "mentos" and one "mixed".but you know that all the labels are in incorrect order .how do you know witch is witch?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.