Type the correct answer in each box. A music company is introducing a new line of acoustic guitars next quarter. These are the cost and revenue functions, where x represents
the number of guitars to be manufactured and sold:
R(X) = 120x
C(x) = 100x + 1,840
The company needs to sell at least
guitars for a total revenue of $
to start making profit.

(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.)