Question

a picture on a wall is 4 feet wide and 4 feet long. the figure shows the picture. which figure shows the area of the picture? (each square has an area of 1 square foot.)

Explanation:

Step1: Recall area formula for wall

The area of a rectangle (the wall) is $A = l\times w$, where $l = 4$ feet and $w = 4$ feet.

Step2: Calculate wall area

$A_{wall}=4\times4 = 16$ square - feet.

Step3: Calculate number of pictures

To find the number of 1 - square - foot pictures that can fit on the wall, divide the wall area by the area of one picture. Let $n$ be the number of pictures. $n=\frac{A_{wall}}{A_{picture}}$, and since $A_{picture}=1$ square - foot, $n = 16\div1=16$.

Answer:

16