Deduce wether the triangle is tight angled

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

What’s the answer ? use the picture to see the problem

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?