Hunter bought a cell phone for $159 and 6% sale tax was added at the register. Hunter gave the cashier nine $20 bills, how much change should he receive?

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

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20