Mathematics, 22.01.2021 17:00, vipergod07

a girl is at the top of a vertical cliff, at a point 120m above the ocean. she hammers a tennis ball up into the air. after 2.5 seconds, the ball reaches a maximum height of 145m above the ocean. when is the ball just 20m above the ocean?

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a girl is at the top of a vertical cliff, at a point 120m above the ocean. she hammers a tennis ball...

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