The sum of two integers is 9. Their difference is 5. What are the two integers? (A) 7 and 12
(B) -7 and 16
(C) -12 and -7
(D) 2 and 7​

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

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