Will give brainliest if correct.

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year