2470.62 – Solar Panel

Tags:Problem Set 9Algebra/TrigonometryAlgebra

If a certain type of solar panel were to be sold for $x\text{\textdollar}x, the seller would take a 15 percent loss based on materials required to produce it. If the same solar panel were sold for $y\text{\textdollar}y, the seller instead would make a 15 percent profit based on cost. What is the ratio of xx to yy?


If cc is the cost of producing the panel, then we know that x=0.85cx=0.85c and y=1.15cy=1.15c. Therefore:


The ratio of xx to yy is 17 to 23, or about 3 to 4.

(Is this problem for real, or is it just a cheap way of having students to do a lot of work?)