10. Mr. Ruiz, the owner of a canoe shop buys paddles for $25.00 each and sells them for 150% profit . A costumer buys a paddle for $40.78, which includes the selling price and sales tax. What is the sale tax rate ? A)8%
B)12%
C)5.5%
D)8.75%

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters