A swimmer is swimming 25 meters sprints. If he swims 5 sprints in 3 minutes, 6 more sprints in 5 minutes, and then 4 final sprints in 2 minutes, what was his average speed during his sprints?

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

step-by-step explanation: