Afreight train leaves a station traveling 60 miles per hour. 30 minutes later, a passenger train leaves the station in the same direction on a parallel track at a speed of 72 miles per hour. how long will it take the passenger train to catch the freight train?

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)