calculate the area of the shaded region in each figure. use 3.14 for π and round to the nearest 10th if nessary

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)