Question: can someone help me solve this plz. On Mars, gravity is weaker than here on earth. If you throw a ball upwards with a velocity

can someone help me solve this plz.

On Mars, gravity is weaker than here on earth. If you throw a ball upwards with a velocity v , then its height after t seconds is given by the function h(t) = -2t2 + vt (in meters). If the ball reaches its maximum height after 10 seconds, how fast did you throw it? meters per second

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