Mr andretti has two options for driving to work, the freeway and the back way. He's curious about how long it takes to get to work by each route, so he randomly chooses a different route each day on the basis of a coin flip. After 30 trips to work, he looks at the results. Below are the dot plots of the two distributions

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.

Compare and contrast the environmental consequences of reliance on coal with reliance on petroleum.

When the blood leaves the atria (upper chambers) where does it flow to? a. aorta b. lungs c. ventricles d. rest of the body