Harper sells appliances. She makes a weekly salary of $450 plus 3% commission on her total sales for the week. If her sales this past week were

$3200, find her total earnings for the week.

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What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

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.