John and Phil were playing tennis. They each hit a tennis ball at the same time and measured the how high the tennis balls went and how long it took for each one to
land on the tennis court. The graph represents the height of the tennis ball 1
seconds after it was hit by john

The function f given by $ (1) = (-161 – 2) (1 – Zepresents the height of the
tennis ball t seconds after it was hit by Phil. In both functions, height is measured in feet.
Part 1. Whose tennis ball hit the tennis court first? When did that happen?
Part 2. Phil's tennis ball reached its maximum height after a seconds. Did Phil's
tennis ball reach a higher maximum than John's tennis ball?
Part 3. What was the maximum height of Phil's tennis ball? Round your answer to
the nearest whole number.

(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?