A rectangular fish tank has width w inches, length w + 8 inches, and height 18 – w inches. All dimensions are greater than 6 inches. The volume of the tank is 1440 cubic inches. Find the length of the fish tank.

(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.)