Acard shop sold 172 cards on friday. it sold 258 cards on saturday.

about how many more cards did the shop sell on saturday than on friday?
(give your answer to the nearest 10 cards.)

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Acircle has a circumference of 28.36 units what is the diameter of the circle

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