To find r, you need to isolate it. pi*r^2*60=18,840. divide 18,840 by 60, then pi, it comes out at 100. Now find the square root to get 10
r=10
Answer:
(0,2)
Step-by-step explanation:
Answer:
60
Step-by-step explanation:
because half of children is 50. 120÷50=60