Answer:
The width of the deck is 11 ft .
Explanation:
Formula
Area of a rectangle = Length × Breadth
As given
Minh wants to build a rectangular deck that has an area of 165 square feet.
The length of the deck will be 15 feet long.
Putting the values in the formula
165 = 15 × Breadth

Breadth = 11 ft
Therefore the width of the deck is 11 ft .