Income Range ($) | Progressive Tax Rate $40,000 salary/yr 0-10,000
3%
10,000 - 50,000
5%
50,001 - 100,000
5.5%

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.