2. Điều nào sau đây không đúng trong một thế giới không khan hiếm? a. Không cần nghiên cứu kinh tế học. b. Mọi người đều có tất cả hàng hóa và dịch vụ mà họ muốn. c. Nguồn tài nguyên là vô hạn. d. Tồn tại chi phí cơ hội.

Which of the following statements accurately describes how costs and benefits are calculated?

Carrie works at a canned food production factory. the government wanted to give a boost to the salt industry, so it lined up numerous subsidies and tax exemptions for the sector. this lead to a decrease in production costs. this also meant that consumers could access canned foods at a lower price, which lead to an increase in demand for the product. which kind of economic system is carrie’s company dealing with? carrie’s company is dealing with a/an economy.

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.