Apipe made of metal 1cm thick , has and external radius of 11cm. find the volume of metal used in making 2.4 m long pipe

Fred has a total of 62 dvd and cd. if the number of cd is three more than two times the number of dvd, how many cd does he have?

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?