A car door lock has a five button keypad each button has two numerals how many different five button patterns are possible? You can use a button more then once

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?

Bernice paid $162 in interest on a loan of $1800 borrowed at 6%. how long did it take her to pay the loan off?

Tell whether the two rates form a proportion