The price of a CD that sells for 21% more than the amount (m) needed to manufacture the CD

A. 7/5m
B.0.79m
C.2/5m
D.3/5m
E. 1.21m

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827