The coach for the Knights basketball team is buying new sneakers for her 12 players. Super Sports is offering a 18% discount on each pair of shoes, which were originally .priced at $74.50. A 6.5% sales tax will be applied to the discounted price. The same sneakers are also available at Double Dribble's website for $55.75. A 9% tax, plus a $5.99 shipping fee will be applied. What is the difference in the total cost of the 12 pairs of sneakers between the two stores?​

(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.)