Cody and Kayla each improved their yards by planting rose bushes and geraniums. They bought
their supplies from the same store. Cody spent $238 on 14 rose bushes and 14 geraniums.
Kayla
spent $231 on 11 rose bushes and 15 geraniums. Find the cost of one rose bush.

(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.)