What is the name for the area between two concentric circles upon which the formula for the volume of a sphere is derived

a. hypothem
b. cross section
c. annulus
d. cavalieri section

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.