A supplier for the Apple Co. manufactures batteries and chargers for the iphone 8 at plants in Michigan and Texas. The cost to replace a battery or a charger at each plant is given in the table below. How many batteries and how many chargers (same amount from each plant) can be bought from this supplier if the Apple Co. plans on spending $92,676.96 total at the Michigan plant and $68,975.19 total at the Texas plant? Plant Batteries Chargers Michigan $69.99 $8.49 Texas $49.00 $12.73

(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?