A projectile's height above ground is a quadratic function of time t in seconds since launched. Three values of the function are given in the table below. How many seconds does it take for the projectile to hit the ground?

Question

A projectile's height   above ground is a quadratic function of time t in seconds since launched. Three values of the function are given in the table below.  How many seconds does it take for the projectile to hit the ground?

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The Answer of A projectile's height   above ground is a quadratic function of time t in seconds since launched. Three values of the function are given in the table below.  How many seconds does it take for the projectile to hit the ground?

A Projectile's Height Above Ground Is a Quadratic