Multiply 80 by 5/8ths.
80*5/8=50
Answer: well, we don't have another number so i'll use variables
VG < 15
An easy way to remember what is the lesser value is to think of an alligator; the alligator wants to eat the bigger prey so in your case the bigger prey would be 15.
Area would be 4.52 A= pi x radius squared
Circumference would be 7.54 C= 2 pi radius. Hope that makes sense.