The outside diameter of a metal pipe is 16 in. the inside diameter of the pipe is 10 in. if the pipe is 20 in long. what is the volume of the metal needed for the pipe?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?