A rock is dropped from a height of 100 feet. Calculate the time between when the rock was dropped and when it landed. If we choose "down" as positive and ignore air friction, the function is h(t) = 25t^2 - 81.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

The total number of dental clinics total for the last 12 months was recorded

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.