1. Bianca comprou 3 camisetas e pagou R$120,00. Quanto ela pagaria se comprasse 5 camisetas do mesmo tipo e preço? A) R$ 150,00 (B) R$ 180,00 (C) R$ 200,00 D) R$ 220,00

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?