Emma works in a department store selling clothing. She makes a guaranteed salary of

$200 per week, but is paid a commision

on top of her base salary equal to 15% of

her total sales for the week. How much

would Emma make in a week in which she

made $800 in sales? How much would

Emma make in a week if she made x

dollars in sales?

(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.)