Answer: the width must be at least, 15 feet
Explanation:
The formula for determining the area of a rectangle is expressed as
Area = length × width
With = Area / length
To cover a rectangular region of her yard, Penny needs at least 232.5 square feet of sod. This means that
LW ≥ 232.5
The length of the region is 15.5 feet. This means that
15.5W ≥ 232.5
W ≥ 232.5/15.5
W ≥ 15