Question #39 

You are choosing between two brands of AAA batteries for your graphing calculator.  A package of four Brand E batteries costs $5.50, and a package of four Brand D batteries costs $3.85. What percent of the cost of Brand E batteries did you save by buying a package of Brand D batteries?


A.      30%                                        B.      70%

C.      55%                                        D.      38.5%

Question #40

As a waiter in a restaurant, you work 6-hour shifts. You earn $2.50 per hour and get to keep 80% of your tip money. How much tip money do you need to receive per shift to earn a total of exactly $75 before taxes are deducted?


A.       $60                                          B.       $15

C.       $75                                          D.       $100

Question #50

Which of these equations describes a relationship in which every real number x corresponds to a nonnegative real number?


A.       y = 2x                                          B.       y = 2x^ 2

C.       y = 2x^ 3                                    D.       y = -2x