A spaceship approaching touchdown on a distant planet has height h, in metres, at time t, in seconds, given by h 25t 100t 100 When does the spaceship land on the surface With what speed does it land (assuming it descends vertically)

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Question: A spaceship approaching touchdown on a distant planet has height h, in metres, at time t, in seconds, given by h = 25t - 100t

A spaceship approaching touchdown on a distant planet has height h, in metres, at time t, in seconds, given by h = 25t² - 100t + 100. When does the spaceship land on the surface? With what speed does it land (assuming it descends vertically)?

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