The function describes the volume of a right circular cylinder of height 3 ft and radius r feet. find the instantaneous rate of change of the voume with respect to the radius when r = 5

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?