Three out of four of workers drive to work alone. If seven workers are chosen, find the probability that three drive to work alone.

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.