Bob bought some new boots that cost $67.34. He paid 7.5% tax. How much did he pay at the cash register? A. $3.20
B. $24.78
C. $72.39
D. $33.40

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .