An iron pipe 20 cm long has exterior diameter equal to 14 cm. If the thickness of the is 1cm, then whole surface of the pipe is

(hurry! ) which expression is equivalent to the following complex fraction?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be