Charlotte ordered 1 portion of charcoal grilled chicken, 1 portion of garlic bread, and 2 portions of stewed rice. Sarah ordered 2 portions of garlic bread and 3 portions of stewed rice. Naomi ordered 3 portions of charcoal grilled chicken, 2 portions of garlic bread, and 2 portions of stewed rice. Charlotte's take-out costs $11, Sarah’s take-out costs $13.50, and Naomi's take-out costs $19.

Which of the following systems of equations can be used to find the cost of 1 portion of charcoal grilled chicken, c, 1 portion of garlic bread, g, and 1 portion of stewed rice, s?

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.)