What is the factorization of the trinomial below?
-x^2-2x+48
a. (x-6)(x+8)
b. -1(x-8)(x+6)
c. (x+6)(x-8)
d. -1 (x+8)(x-6)

(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.)