exam Maths Puzzle Numerical Ability

Please help me figure this one out....

A ball dropped from a certain height rises after bouncing 30% of its original height. After bouncing if the ball rises 2 1/2 ft, what is t

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what is the equation of a line that passes through the points (4,1) and (3,-2) find a rational function that has x=4 and x=3 as vertical asymptotes, and (-2,0) as an x-intercept