Astudent factors 3x2 – 12 to the following.
3(x2 – 4)
which statement about 3(x2 – 4) is true?
the expression is equivalent, and it is completely factored.
the expression is equivalent, but it is not completely factored.
the expression is not equivalent, but it is completely factored.
the expression is not equivalent, and it is not completely factored.

(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.)