Please help this is 2 nd grade, i will mark you brainliest, please help

How to use order of operation in 20 divide by 4 multiply 5 = 1

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 ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry