Answer
\$35.70
Work Step by Step
The pen includes 2 triangles with a base(b) of 1 ft and a height(h) of 3 ft, and one rectangle with a base(b) of 3 ft and a height(h) of 6 ft. Find the area of each, and add them to find the area of the pen.
$A_1=\frac{1}{2}bh=\frac{1}{2}(1)(3)=1.5$
$A_2=\frac{1}{2}bh=\frac{1}{2}(1)(3)=1.5$
$A_3=bh=(3(6)=18$
$A=A_1+A_2+A_3=1.5+1.5+18=21$
21 square feet are needed. Find the cost.
$21\ sq\ ft\times\frac{\$1.70}{1\ sq\ ft}=\$35.70$
