Answer:
5cm
Step-by-step explanation:
A=4πr2 = 100πcm2
r = 5
a:75
c:11
0.5333333333
_
3 is infinite
28 questions answered.
40(2/5) is 16 questions.
40-16 is 24 questions left.
24(.5) is 12 questions.
16+12 gets you 28 questions.
