Stacy spent £15 on ingredients for bread. She made 12 loaves and sold them for £1.80 each. Calculate her percentage profit.

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

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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