Identify if the polygons below are convex or non convex​

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

Acircle has a circumference of 28.36 units what is the diameter of the circle

Measure a and b and find their sum. how are the angles related?