Question 1 You find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42.

a. Write an equation you can use to find the sales tax rate r.

An equation is 42=
.

Question 2
b. Can you use r to find the percent for the sales tax? Explain.

; You
multiply r by
to get the percent for the sales tax.