Select all the expressions that equal 3^4 A. 7
B. 4^3
C. 12
D.81
E. 64
F.9^2

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]