Adriano runs a website that writers write better stories. every month, adriano receives a subscription fee of $5 from each of the subscribers to his website. the website had 200 subscribers last month. this month 40 new members joined the website and 10 members canceled their subscription.

how much money will adriano’s online business earn this month?

(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.)