To find the number of miles in 100 kilometers, a. multiply 100 by 0.6215 b. divide 100 by 0.6215 c. multiply 100 by 3.281 d. divide 100 by 3.281

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?

Which is the graph of the function y=2(4)^x

Simplify the expression. -2/5(10+15m-20n)