In exercises 25-32, use the appropriate arc length to find the missing information s = arc length (in radians)
r = radius
\theta = central angle in radians
s r ∅
25 ? 2in 25 rad
26 ? 1cm 70 rad
27 1.5ft ? π/4 rad
28 2.5cm ? π/3 rad
29 3m 1m ?
30 4in 7in ?
31 40cm ? 20°
32 ? 5ft 18°

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