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An apple falls straight to the ground from a tree branch 8 meters above the ground. The apple's height above the ground, t seconds after it starts falling, is H meters, where H=8-4.9$$t^{2}$$ and t≥0. How many seconds after the apple starts falling does it hit the ground?
Give your answer to the nearest 0.1 second.
Give your answer to the nearest 0.1 second.
1.3 显示答案
以上解析由 考满分老师提供。
