Main Street Auto Leasing has a ratio of cars to trucks that is 9:4. Part A
If Main Street Auto Leasing only leases cars and trucks, what is the ratio of cars to the total number of vehicles?

9/4
4/9
9/13
4/13
Part B
Airport Auto Leasing has a ratio of cars to trucks that is 5 to 3.
If each leasing center has 24 trucks, which auto leasing company has more cars?

Main Street Auto Leasing has more cars since it has_ cars while Airport Auto Leasing has_ cars only.

What is the size of the matrix resulting from

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Twelve less than a number is at most 20