Need asap if u could explain how u got your answer it would be greatly appreciated.

the volume of a cylinder is 64π cubic centimeters. if the radius of the cylinder is 4 cm, what is the height of the cylinder? (v = πr2h)
a) 2 cm
b) 3 cm
c) 4 cm
d) 6 cm

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)