To make lemonade, 2 cups of lemon juice are mixed with 7 cups of water. a) How many cups of lemon juice do you need if you have 28 cups of water?
b) What is the ratio or lemon juice to water if you have 56 cups of lemonade?

(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.)