Which expression is equivalent to 21^3sqrt15 - 9^3sqrt15? A. 12
B. 30^3sqrt15
C. 12^3sqrt5
D. 12^3sqrt15

(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.)

Which of the following statements is a true conclusion that can be made from the scaled bargraph?

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?