What is the volume of a cone with a radius of 7 cm and a height of 9 cm

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?

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.

What are the solutions of the following system? y=-2x^2 y=x-2