How do you know that the product of any two numbers greater than 1 must be a composite number?

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

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13