exam Maths Puzzle Numerical Ability

Write in Standard Form. Find C: 2x = -4 + x2^

a) -4
b) 4
c) 2
d) -2
e) None of these

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A ball is thrown vertically upward at an initial speed of 64 ft/sec. Its height (in feet) after t seconds is given by h(t)=t(64-16t). After how many seconds does the ball reach its maximum height? The rectangular tabletop has a width that is two feet less than four times its length. If the area of the tabletop is 20ft^2, what are the dimensions of the tabletop?