∠A and \angle B∠B are supplementary angles. If m\angle A=(x+6)∘ , ∠A=(x+6) ∘ and m\angle B=(7x+30)^∘∠B=(7x+30)∘, then find the measure of \angle A∠A.

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?