Recall that the demand equation is Q=27-3P, the supply equation is Q=-9+9P, the initial equilibrium price is P*=$3.00 (dollars per pound), and the initial equilibrium quantity is Q*=18 (million metric tons per year).Using the given demand and supply equations, calculate the effect of a 25-percent decrease in copper demand on the price of copper. Note: use the initial equilibrium values for P* (= $3.00) and Q* (= 18 million metric tons) when calculating the changes below. As a result of this change in demand, the price of copper will (increase/decrease) by $ .

Consumer surplus is: the difference between the price of a product and what consumers were willing to pay for the product. the difference between the discounted price of a product and its retail price. the difference between the price paid by consumers and the price required of producers. the difference between the price of a product and consumers' valuation of the last unit of the product purchased.

John and daphne are saving for their daughter ellen's college education. ellen just turned 10 at (t = 0), and she will be entering college 8 years from now (at t = 8). college tuition and expenses at state u. are currently $14,500 a year, but they are expected to increase at a rate of 3.5% a year. ellen should graduate in 4 years--if she takes longer or wants to go to graduate school, she will be on her own. tuition and other costs will be due at the beginning of each school year (at t = 8, 9, 10, and 11).so far, john and daphne have accumulated $15,000 in their college savings account (at t = 0). their long-run financial plan is to add an additional $5,000 in each of the next 4 years (at t = 1, 2, 3, and 4). then they plan to make 3 equal annual contributions in each of the following years, t = 5, 6, and 7. they expect their investment account to earn 9%. how large must the annual payments at t = 5, 6, and 7 be to cover ellen's anticipated college costs? a. $1,965.21b. $2,068.64c. $2,177.51d. $2,292.12e. $2,412.76

How much of your paycheck do you have immediate access to once you deposit it into your bank account a. all of it b. a portion of it c. none of it