If a to the first power equals five and a the the n power equals a to the n-1 power then what is the value of a to the fourth power

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.