Starting at sea level, a submarine descended at a constant rate to a depth of −56 mile relative to sea level in 4 minutes. what was the submarine's depth relative to sea level after the first minute? enter your answer in the box as a fraction in simplest form.

(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.)