Kristin makes spaghetti for a party. The recipe calls for 214 2 1 4 cups of tomato sauce to serve 15 people. How much tomato sauce, in cups, does the recipe use per person?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

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

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota