exam Maths Puzzle Numerical Ability

If a soccer ball is kicked straight up fram the ground with an initial velocity of 32 feet per second, then its height above the earth in feet is given by
s(t)=-16t^2+32t where t

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exam Other Question

How many real roots and or imaginary roots does the following equation have:

x^2 - 625 = 0

Thanks The lines described by 3x-y=17, 2x+5y=17, x+2y=a+b, and x-y=3b-5a all pass through the same point. What is the ratio of a to b?