Use the rules for multiplication by powers of 10 to calculate 3 times 100

What is x and y intercepts for y=x+7

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

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.