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A large explosion causes wood and metal debris to rise vertically into the air with an initial velocity of 11.5 feet per second. The function

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A large explosion causes wood and metal debris to rise vertically into the air with an initial velocity of 11.5 feet per second. The function h(t) = h(t) = - 16t2 + 11.5t + 140 gives the height of the falling debris above the ground, in feet, t seconds after the explosion. How many seconds after the explosion will the debris hit the ground? Round to 2 decimals. Answer: seconds. Calculator

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