I think it would be A because if you multiply the square by a 30 thinking there all the same space between it will give u 120 square yards
Seven will be your radius because it is the smallest measurement 14 will be your diameter because that is double your radius and 44 is your circumference
I believe the correct answer is he paid the right amount
Percent change=change/original times 100
change=20-16=4
original=20
change=4/20 times 100=0.2 times 100=20
answer is 20%