Audrey drove 200 miles in 3.5 hours. Which equation can be used to find the rate "r" at which Audrey was traveling?

(A) 200=3.5r

(B) 200x3.5=r

(C) r/3.5=200

(D) 200r=3.5

Is 40/1000 equivalent to 40%

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What is the answer to 500 : 60

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