SOLUTION: The equation y=-4.9t^2+3.5t+5 describes the height (in meters) of a ball thrown upward at $3.5$ meters per second from $5$ meters above the ground. In how many seconds will the bal

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The equation y=-4.9t^2+3.5t+5 describes the height (in meters) of a ball thrown upward at $3.5$ meters per second from $5$ meters above the ground. In how many seconds will the bal      Log On


   

Question 1083867: The equation y=-4.9t^2+3.5t+5 describes the height (in meters) of a ball thrown upward at $3.5$ meters per second from $5$ meters above the ground. In how many seconds will the ball hit the ground? Express your answer as a common fraction.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
y=-4.9t^2+3.5t+5
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It hits the ground when y = 0
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-4.9t^2+3.5t+5 = 0
Solve for t.
Ignore the negative solution.