Determine the volume and the surface area of the three dimension figure

What is the value of the expression below? (81^2)^1/8

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

(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.)