Question

Kayla wants to cover a rectangular box with wrapping paper. the length of the box is 2 feet, its width is 1 foot, and its height is 1 foot. the cost of wrapping paper is $0.90 per square foot. how much will it cost kayla to cover the box with wrapping paper?

Answer 1

The perimeter of a rectangle formula is =2(l+w)
Just plug in the number and you'll find out how much you'll need. 
Once you get this amount, multiply it my $.90 and you should receive the cost of the wrapping paper.