a square fits exactly inside a circle with each of its vertices being on the circumference of the circle. the square has side length of x cm. the area of the circle is 56cm2. work out the value of x. give your answer correct to 3 significant figures

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?