Hello, clockworks204!
Looks good to me!
Hi, I'm having trouble with this problem. I've worked it, and my answer keeps getting flagged as incorrect:
By what percent is the area of a 12.4- cm-radius circle increased if the radius is increased 1.0 cm?
I come up with 16.8% using pi(r^2) and dividing the difference by 12.4's area. Thanks in advance!