Anumber pattern is shown below. row 2: 8, 10. row 3: 15, 17, 19. row 4: 24, 26, 28, 30. row 5: 35, 37, 39, 41, 43. write an equation that can be used to find d, the difference between the last number and the first number, for any row r. show or explain your work.

(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.)