book Maths Puzzle Numerical Ability

fireworks are launched over a lake from a dam 32ft. above the water. The height of a display, t seconds after it is launched, is given by
h(t)=-16t^2+16t+32. After how long wil

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book Other Question
directions: determine if the binomial is a factor of the polynomial.

3x^3+5x^2+x+6 ; x-4

how do i go about solving this with these directions? The Set of numbers A={2,3,4,5} and an operations called *. Results for * are given below

* 2 3 4 5
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2| 3 2 3 4
3| 2 3 4 5
4| 3