Can someone me with this question ?

Factor the expression using gcf 9b+45

In the triangle rst, rs = 65 and st = 60. which equation could be used to find the value of angle s?

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?