The volume of a cylinder is 980 in.. the height of the cylinder is 20 in. what is the radius of the cylinder? express your answer to the nearest hundredth.
a. 3.95 in.
b. 4.96 in.
c. 15.61 in.
d. 18 in.

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2