Receiving $100 at the end of the next three years is worth more to me than receiving $260 right now, when my required interest rate is 10%

If the amount payable in two years is $2420 for a simple loan at 10 percent interest, the loan amount is

A) $1000. B) $1210. C) $2000. D) $2200.

Which of the following is a characteristic of a monopoly?

a. rising average total costs b. one buyer c. rising fixed costs d. a product without close substitutes