The figure shows line RS parallel to line UV. The lines are intersected by 2 transversals. All lines are in the same plane.

Explain why triangle RTS is similar to triangle VTU.

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%