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The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left
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Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =
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If y+g-9+c=69 and y and h equal 420 what is c...
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