Sally is giving manicures and styling hair for the women at the shelter from 8am - 4pm each day this weekend. On Saturday she gave six manicures and styled 5 ladies' hair. On Sunday, she gave 10 manicures & 3 hair styles. How long does each manicure and hair styling take?

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?