Mathematics, 10.05.2021 09:50, tsumugiisama

Sarah is riding a hot-air balloon over a lake. From an altitude of 4000 feet, she throws a rock straight down toward the water. When the rock leaves her hand, its velocity is 30 feet per second. How long will it take the rock to hit the water?

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Sarah is riding a hot-air balloon over a lake. From an altitude of 4000 feet, she throws a rock stra...