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Mathematics 18 Online
OpenStudy (anonymous):

WILL GIVE MEDALS!! Ellen is at a hydroplane boat show. Starting from 1.0 miles away, the boat drives toward her and then passes her. The boat travels at a constant rate of 70 miles per hour. The distance of the boat from Ellen is given by d=|1.0-70t| at what time is the boat 0.15 miles from Ellen? (Calculate your answer in seconds) A. 42 s and 61 s B. 40 and 50 s C. 437 s and 591 s D. 43.7 s and 59.1 s

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