I NEED HELP ASAP FIRST PERSON CORRECT GETS BRAINLIST

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Which table represents a linear function? i'll give brainliest to first answer ^'^

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