Mr. gomez took his family to the zoo and spent $30.50 on drinks and food. he spent $14 on drinks that cost $1.75 each. he spent the rest on hamburger combos that cost $2.75 each. how many hamburger combos did mr. gomez buy?

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

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