Posted by denise on .
A shopkeeper is making a triangular sign for his store front, but he must keep the sign under 20 square feet to adhere to the zoning laws. If the base of the sign is 20 feet, what is the maximum height of the triangular sign?

algebra 
Reiny,
Area of triangle = (1/2)base x height
(1/2(20)(height) < 20
solve for height