Eyjafjallajökull is a volcano in ice land. during a recent eruption, the volcano, spewed out copious amounts of ash. one small was ejected from the volcano with an initial velocity of 336ft/sec. the height h, in feet, of our ash projectile is given by the equation h= -16t2 +336t. where t is the time is seconds, assuming the volcano has no height. h=0 t=0
1. when does the ash projectile reach its maximum height?
2. what is its maximum height?
3. when does the ash projectile return to the ground?

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