the growth in earnings for a digital music service is shown in the graph. what is the equation of the line? show yoyr work. define your variable

What is the y intercept of f(x)=(1/2)^x?

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?

Find the area of the regular hexagon if a side is 20 cm.