Anewly discovered planet has a mass of 4.8743 · 10 ^22 kilograms. it's estimated that there is water on the surface and that, the water's mass is only 4 · 10^ -2 percent of the planet's total mass. use scientific notation to estimate the mass of the planet's water. in your final answer, include all of your estimates and calculations.

(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.)