Mathematics, 14.03.2020 02:50 zahradawkins2007

A boy in the back of a pick-up truck going due east at 30 miles/hour throws a rock at 20 miles/hour in the direction S25◦W. What is the true speed and direction of the rock?

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A boy in the back of a pick-up truck going due east at 30 miles/hour throws a rock at 20 miles/hour...