)a photovoltaic array of (solar cells) is 10.0% efficient in gathering solar energy and converting it to electricity. if the average intensity of sunlight on one day is 700w/m2, what area should your array have to gather energy at the rate of 100 w? (b) what is the maximum cost of the array if it must pay for itself in two years of operation averaging 10.0 hours per day? assume that it earns money at the rate of 9.00 ¢ per kilowatt-

4. suppose that pollution in a neighborhood comes from two factories, with marginal benefit curves given by mb1 = 12 – p1 and mb2 = 8 – p2. the level of pollution in the neighborhood is given by p = p1 + p2. the government wants to limit pollution by instituting a pollution-rights market. the government’s desired level of p is 10, so it prints 10 pollution rights and offers them for sale to the firms.a)find the equilibrium selling price of a pollution right, as well as the allocation of rights (and hence pollution levels) across the two factories. b)repeat part (a) for the case where the government’s desired level of pollution equals 14. c)comment on the usefulness of a pollution rights market in achieving efficient levels of pollution abatement.

What do you think: would it be more profitable to own 200 shares of penny’s pickles or 1 share of exxon? why do you think that?

Lead time for one of your fastest-moving products is 20 days. demand during this period averages 90 units per day.a) what would be an appropriate reorder point? ) how does your answer change if demand during lead time doubles? ) how does your answer change if demand during lead time drops in half?