Five cars travel for 45 minutes on straight flat roads without interruption. Information about their speeds and time at each speed follows. Car A travels at 1 km/min for 30 min then travels at 1.2 km/min for 15 min. Car B travels at 1 mi/min for 20 min then .8 mi/min for 25 min. Car C travels at 50 mi/hr for 25 min the 70 mi/hr for 20 min. Car D travels at 60 km/hr for 15 min and 80 km hr for 30 min. Car E travels at 60 mi per hour for 45 minutes. Which car has the highest average speed for the entire trip?

Let us imagine that the number of automobile accidents in a certain region are related to the regional number of registered automobiles in tens of thousands (b1), alcoholic beverage sales in $10,000 (b2), and decrease in the price of gasoline in cents (b3). furthermore, imagine that the regression formula has been calculated as: y = a + b1x1 + b2x2 + b3x3 where y = the number of automobile accidents, a = 7.5, b1 = 3.5, b2 = 4.5, and b3 = 2.5 calculate the expected number of automobile accidents for a football weekend if the region has 25,000 registered vehicles, $75,000 worth of beer is sold, and a gas war causes a 10 cent drop in a gallon of gas.