Dr. Johnson treated 1134 patients in 63 days. About how many patients did she treat each day on the average?

A. 71

B. 20

C. 31

D. 18

E. 19

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?