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Algebra
Pregunta

3. A ball is thrown up into the air, its height h,...

3. A ball is thrown up into the air, its height h, in metres, after t seconds is \(  h = - 4.9 t ^ { 2 } + 38 t + \) \( 1.75 \) . 

a) What is the height of the ball after \( 3 s \) 

b) For what length of time is the ball above \(50 m \) ? 

c) When does the ball strike the ground? 

Answer

a) 71.65

b) 4.6

c)7.801

Solución
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