1. Find the least number of terms that is required such that the geometric series 3 + 2 + 4/3 + … just exceeds 8.25. 2. The first term and common ratio of a geometric progression are a and r respectively. The geometric progression has 7 terms with the difference between the last term and the first term is 31 ½ , while the difference between the fourth term and the first term is 3 ½ . Find the sum of all the terms of the progression. ​

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

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

Can you me find the missing length. i attached an image.