Amanufacturer is designing a flashlight. for the flashlight to emit a focused beam, the bulb needs to be on the central axis of the parabolic reflector, 3 centimeters from the vertex. write an equation that models the parabola formed when a cross section is taken through the reflector’s central axis. assume that the vertex of the parabola is at the origin in the xy coordinate plane and the parabola can open in any direction. can someone explain how i can find this equation?

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