The function f(x) = –10(x)(x – 4) represents the approximate height of a projectile launched from the ground into the air with an initial velocity of 40 meters per second. how long, from launch to landing, does the projectile stay in the air?

∠aed is formed inside a circle by two intersecting chords. if minor arc bd = 70 and minor arc ac = 180, what is the measure of ∠ aed? a) 45° b) 50° c) 55° d) 60°

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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