What is a linear pair

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

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?