Donna has a 60 mile drive to a work conference. She begins driving at 30 miles per hour, but halfway through the drive

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Donna has a 60 mile drive to a work conference. She begins driving at 30 miles per hour, but halfway through the drive she realizes she is going to be late and speeds up. How fast should she drive the remaining distance (in miles per hour) if she needs to complete the entire trip in 90 minutes?

A. 55
B. 60
C. 65
D. 70
E. 88



OA B

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