Ajar holds 2 3/4 cups of water how much is this in fluid ounces

The system of equations graphed below has how many solutions? y = 2x + 2

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?

We just started the introduction into circles and i have no idea how to do this.