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OpenStudy (anonymous):
Two cars start moving from the same point. One travels north at 20 mi/h and the other travels east at 30 mi/h. At what rate is the distance between the two cars increasing 2 hours later? D = sqrt[(30t)² + (20t)²] D = sqrt(900t² + 40t²) D = sqrt(940 t²) D = sqrt(940) t = 30t dD/dt = 30 miles per hour someone check this please?
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OpenStudy (bahrom7893):
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