Atrain is traveling from new orleans to memphis at a constant speed of 79 miles per hour. new orleans and tennessee 395.1 miles apart. how long will it take thetrain to reach tennessee

100,000 random people were tested for condition a. roberto's doctor told him he tested positive for condition a. if the test is 99% accurate and condition a is rare—one out of every thousand people have it. what is the probability that testing positive means roberto has condition a? 99.0% 1% 9% 99.9%