Which formula can be used to find the nth term in a geometric sequence where a=3 and r=3
a) a=3+2(n-1)
b) a=3(n-1)+2
c) a= 3^(n-1)x2
d) a=3x2^(n-1)

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

If you could answer these your a life saver

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