Acountry is planning to decrease government spending in order to reduce the national debt. if the outlined changes are put into place, the country's debt will decrease exponentially by one-third each year. the current debt is $60 billion in u. s. dollars. if this trend continues, which graph represents the national debt of the country over the next several years?

(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.)