15 rulers cost £3 how much do 40 rulers cost?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.