John needs to paint a wall with spray paint. The wall has a diagonal of 43.6 feet and a height of 8.3 feet. If a spray can will cover 21.5 square feet, how many cans will John need?
+37146 Use Pythag theo to get length 8.3^2 + L^2 = 43.6^2 L= 42.8
Sq Ft of wall = 8.3 x 42.8 = 355.26
Each can covers 21.5 sq ft
355.26/21.5 = 16.524 cans ~ 17 cans
