State whether the product of 3 and 9 is rational or irrational. Explain your answer.

Question

State whether the product of 3 and 9 is rational or irrational. Explain your answer.

Answer 1

a rational number is any number that can be written as p/q where p and q are integers

3 x 9 = 27 = 27/1 which is p/q with p=27 and q=1, both integers.

Answer 2

A rational number is any number that can be written as a fraction where the numerator and denominator are both integers. 3(9) = 18 = 18/1. Therefore, 3•9 is rational.