Please help me with this. If anything just do one with an explanation so i have an idea on how to do it.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?