4. A ball thrown vertically in the air reaches its peak height after 3.5 seconds. If its height, as a function of time, is given by h =-16r² +bt +4 , then which of the following is the value of b? x = - b/2a, x = 3.5, find b. (1) 56 (3) –112 (2) –56 (4) 112

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A: topic - functions

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