Alocal pizzeria sold 55 pizzas yesterday. (a) the owner offers the employees a bonus if the number of pizzas sold increases by 20% today. how many pizzas must the pizzeria sell for employees to receive the bonus? explain your reasoning. (b) suppose the actual number of pizzas sold today was 40. describe the number of pizzas sold as a percent increase or decrease, rounded to the nearest hundredth. show your work.

(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.)