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A red car is located 50 miles to the north of a blue car. The red car begins to drive south at 40 miles per

A red car is located 50 miles to the north of a blue car. The red car begins to drive south at 40 miles per hour. Simultaneously, the blue car begins to drive east at 70 miles per hour. (a) What is the closest that the two cars ever get to each other? (b) How long does it take for this minimum distance to be achieved?

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