Write an expression in terms of the given variable that represents the indicated quantity.

the amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 10 sec.
(hint: the answer should contain q as well as n)

the expression for the amount of bacteria is

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

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