Adolphin is swimming with her friend. the dolphin jumps to a height of 4.5 point, meters above the surface of the water as her friend swims 9.8 point, meters directly below her.
what is the position of the dolphin's friend relative to the surface of the water?

(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.)