Which (if any) of the following scenarios is the result of a natural monopoly? Instructions: You may select more than one answer.
a. Patent holders of genetically modified seeds are permitted to sue farmers who save seeds from one planting season to the next.
b. Doctors in the United States are prohibited from practicing without a medical license.
c. There is one train operator with service from Baltimore to Philadelphia.
d. Coal is used as the primary energy in a country with abundant coal deposits.

The following accounts appeared in recent financial statements of delta air lines. identify each account as either a balance sheet account or an income statement account. for each balance sheet account, identify it as an asset, a liability, or stockholders' equity. for each income statement account, identify it as a revenue or an expense. item financial statement type of account accounts payable balance sheet advanced payments for equipment balance sheet air traffic liability balance sheet aircraft fuel (expense) income statement aircraft maintenance (expense) income statement aircraft rent (expense) income statement cargo revenue income statement cash balance sheet contract carrier arrangements (expense) income statement flight equipment balance sheet frequent flyer (obligations) balance sheet fuel inventory balance sheet landing fees (expense) income statement parts and supplies inventories balance sheet passenger commissions (expense) income statement passenger revenue income statement prepaid expenses income statement taxes payable balance sheet

The following accounts are denominated in pesos as of december 31, 2015. for reporting purposes, these amounts need to be stated in u. s. dollars. for each balance, indicate the exchange rate that would be used if a translation is made under the current rate method. then, again for each account, provide the exchange rate that would be necessary if a remeasurement is being made using the temporal method. the company was started in 2000. the buildings were acquired in 2002 and the patents in 2003. (round your answers to 2 decimal places.) exchange rates for 1 peso are as follows: 2000 1 peso = $ 0.28 2002 1 = 0.26 2003 1 = 0.25 january 1, 2015 1 = 0.24 april 1, 2015 1 = 0.23 july 1, 2015 1 = 0.22 october 1, 2015 1 = 0.20 december 31, 2015 1 = 0.16 average for 2015 1 = 0.19

Analyzing and computing accrued warranty liability and expense waymire company sells a motor that carries a 60-day unconditional warranty against product failure. from prior years' experience, waymire estimates that 2% of units sold each period will require repair at an average cost of $100 per unit. during the current period, waymire sold 69,000 units and repaired 1,000 units. (a) how much warranty expense must waymire report in its current period income statement? (b) what warranty liability related to current period sales will waymire report on its current period-end balance sheet? (hint: remember that some units were repaired in the current period.) (c) what analysis issues must we consider with respect to reported warranty liabilities?