Atrain is traveling at 72km/hr. how far will it go in 7 seconds

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.

How many ordered pairs of positive integers satisfy xy=32?

Interpret the following expression (5y^2-7)^3/(2y)^2