Question 83334
Since the area of a triangle is always half of the area of a rectangle with the same base and height, each cookie will have an area of 


{{{A=(2*4)/2=8/2=4}}}


So each cookie will have an area of 4 sq inches. So the total area is 


Total area=72*4=288


So all the cookies combined make an area of 288 sq in. Now simply divide 288 by 48 to find out how many cans she'll need:

{{{288/48=6}}}


So she'll need 6 cans to ice every cookie