Enrique is 5 years younger than his sister, josefina. josefina is 15. how old is enrique?

The volume of a cube is 8 in to the 3rd power. how long is each side?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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?