Which expression is equivalent to cos(103°)cos(54°) – sin(103°)sin(54°)? sin(49°)
cos(49°)
sin(157°)
cos(157°)

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

What is the radical expression that is equivalent to the expression 27 1 over 5?

(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.)