Noels rectangular deck has a length of 18 feet and width of 16 ft if a hot tub takes up a square that has 4 feet on each side in the middle of the deck, how much area is left of the deck

272

Explanation:
To do this problem you are trying to find how much area is left of the deck after the area of the hot tub is subtracted, which looks like this in an equation:
remaining area of deck = area of deck - area of hot tub
First, find the area of the deck. 
The area formula is A = l • w
Deck length = 18 ft. 
Deck width = 16 ft. 
18 • 16 = 288
Now find the area of the hot tub.
Hot tub length: 4 ft
Hot tub width: 4 ft
4 • 4 = 16
288 - 16 = 272