Espanol Customers of a none company can choose between two service plans for long distance calls. The first plan has an $8 monthly fee and charges an
additional $0.18
for each minute of calls. The second plan has a $15 monthly fee and charges an additional $0.14 for each minute of calls. For how
many minutes of calls will the costs of the two plans be equal?

(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.)