20 POINTS The graph of the function y = 2x2 + bx + 8 is shown. What is the value of b?
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When a rectangle is dilated, how do the perimeter and area of the rectangle change?

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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