Audrey drove 200 miles in 3.5 hours. Which equation can be used to find the rate "r" at which Audrey was traveling?
A200=3.5r
B200x3.5=r
Cr/3.5=200
D200r=3.5
A200=3.5r
B200x3.5=r
Cr/3.5=200
D200r=3.5