Question

a rectangular wall is 8 feet long and 9\frac{1}{2} feet tall. what is the area of the wall?
a. 35 square feet
b. 72\frac{1}{2} square feet
c. 9\frac{8}{16} square feet
d. 76 square feet

Explanation:

Step1: Recall area formula

The area formula for a rectangle is $A = l\times w$, where $l$ is the length and $w$ is the width (or height in this case). Here, $l = 8$ feet and $w=9\frac{1}{2}=\frac{19}{2}$ feet.

Step2: Calculate the area

$A=8\times\frac{19}{2}$. First, $8\div2 = 4$, then $4\times19=76$ square - feet.

Answer:

D. 76 square feet