According to the following situation below, who has the comparative advantage in producing coffee?
costa rica can produce rice, coffee, soybeans, and chocolate. however, because of the climate and land of costa rica, coffee is much cheaper and faster to produce. vietnam can produce rice, coffee, soybeans, and chocolate as well. however, because of the climate and land of vietnam, rice is much cheaper and faster to produce. brazil can produce rice, coffee, soybeans, and chocolate as well. however, because of the climate of brazil, chocolate is much cheaper and faster to produce. the united states can produce rice, coffee, soybeans, and chocolate as well. however, because of the climate of the united states, soybeans are much cheaper and faster to produce.
a. brazil
b. vietnam
c. costa rica
d. the united states

Following are the transactions for valdez services. the company paid $2,000 cash for payment on a 6-month-old account payable for office supplies. the company paid $1,200 cash for the just completed two-week salary of the receptionist. the company paid $39,000 cash for equipment purchased. the company paid $800 cash for this month’s utilities. the company paid $4,500 cash in dividends to the owner (sole shareholder). examine the above transactions and identify those that create expenses for valdez services. prepare general journal entries to record those transactions that created expenses in the above given order.

On january 1, 2018, red flash photography had the following balances: cash, $19,000; supplies, $8,700; land, $67,000; deferred revenue, $5,700; common stock $57,000; and retained earnings, $32,000. during 2018, the company had the following transactions: 1. february 15 issue additional shares of common stock, $27,000. 2. may 20 provide services to customers for cash, $42,000, and on account, $37,000. 3. august 31 pay salaries to employees for work in 2018, $30,000. 4. october 1 purchase rental space for one year, $19,000. 5. november 17 purchase supplies on account, $29,000. 6. december 30 pay dividends, $2,700. the following information is available on december 31, 2018: 1. employees are owed an additional $4,700 in salaries. 2. three months of the rental space has expired. 3. supplies of $5,700 remain on hand. 4. all of the services associated with the beginning deferred revenue have been performed.required: 1. record the transactions that occurred during the year.2. record the adjusting entries at the end of the year.3. prepare an adjusted trial balance.4. prepare an income statement, statement of stockholders’ equity, and classified balance sheet.5. prepare closing entries.

Alarge tank is filled to capacity with 500 gallons of pure water. brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. the well-mixed solution is pumped out at the same rate. find the number a(t) of pounds of salt in the tank at time t.