Which equation to represent the following sentence: Two pounds of nuts costs x dollars per pound and four pounds of chocolate costs $3 per pound combining to a total amount of $20.

2x+60=4

2(x+4)=20

2x+12=20

2(x+12)=20

(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.)