Six donuts cost a total of $3.54 what is the cost for one donut

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

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