A man is standing on a straight bridge over a river and another man on a boat on the river just below the man on the bridge. If the first man starts walking at the uniform speed of 4m/min
and the boat moves perpendicularly towards the bridge at the speed of

5m/min
, then at what rate are they separating after

4min
, if the height of the bridge above the boat is

3m

(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.)