Find the length of the arc

Determine the relationship of ab and cd given the following points

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?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers