Frank tells jack,"im thinking if a number between 1 and 10

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.