Lana makes $8 an hour plus $12 an hour for every hour of overtime. overtime hours are any hours more than 40 hours for the week.

part a: create an equation that shows the amount of wages earned, w, for working x hours in a week when there is no overtime. (3 points)

part b: create an equation that shows the amount of wages earned, s, for working y hours of overtime. hint: remember to include in the equation the amount earned from working 40 hours. (3 points)

part c: lana earned $368 in 1 week. how many hours (regular plus overtime) did she work? (4 points)

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?