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h(x)=-16x^2 + 100x+10 The quadratic fu...

`h(x)=-16x^2 + 100x+10`
The quadratic function above models the height above the ground h, in feet, of a projectile x seconds after it had been launched vertically. If y = h(x) is graphed in the xy-plane, which of the following represents the real-life meaning of the positive x-intercept of the graph?

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