31.25% of the population is under 25 years of age. To figure this out, divide 20,000 by 64,000. Then, multiply that answer by 100 to get a percentage. Hope this helps!!
Answer:
15.8333333333
Step-by-step explanation:
9.5 divied by 3.5

by making r the subject, you need to divide the whole equation by 2πh
s/2πh = 2πhr/2πh
cancel out
r = s/2πh