The volume of air inside a rubber ball with radius r can be found using the function v(r)=4/3 πr3 . what does v[5/7] represent? a. the radius of the rubber ball when the volome equals 5/7 cubic feet b. the volome of the rubber ball when the radius equals 5/7 feet c. that the volume of the rubber ball is 5 cubic feet when the radius is 7 feet d. that the volume of the rubber ball is 7 cubic feet when the radius is 5 feet

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- 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. 3- 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 part b?