Tomas makes balloon sculptures at a circus. in 180 minutes, he uses 252 balloons to make 36 identical balloon sculptures.
a. how many minutes does it take to make one balloon sculpture? how many balloons are used in one sculpture?
b. what is tomas's unit rate for balloons used per minute?

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)