An aquarium costs $85 plus $2 per fish. Write an equation to
find the cost c of an aquarium plus
any number of fish f. Make a table to
find the cost of an aquarium plus 3, 4,
5, or 6 fish.

C=85+2x

Step-by-step explanation:

c=85+2(3)     --   $91

c=85+2(4)     --   $93

c=85+2(5)     --   $95

c=85+2(6)     --   $97

The rectangle that uses it's perimeter to enclose the most area is a square.

If the perimeter is 162 ft, then each side of the square is

162 / 4 = 40.5 ft.

The area is

(40.5) x (40.5) = 1,640.25 square feet.

If the sides have to be whole numbers, then the closest she can get is 40 ft x 41 ft.
The area is 1,640 square feet.