Bab needs help with complex numbers

Combine the information in the problem and the chart using the average balance method to solve the problem.

(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.)

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.