The scatter plot shows the total number of songs downloaded on a popular music service. Graph where the x- axis gives years after 2009 and runs from zero to five and beyond. The y- axis gives songs in billions and runs from zero to forty and beyond. A scatter plot line intersects the y- axis at (0, 5).

What is the equation of the linear model using two points on the line?
A. y = x + 10
B. y = 5x + 5
C. y = 10x + 1
D. y = 8x + 2

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

How do you write something in scientific notation?