An order from an exchange for a seller to add enough funds to meet the minimum balance in a margin account is called:

The confidence you have that a retailer will accept dollars in exchange for goods is based primarily on money

a. being a unit of account. b. being a medium of exchange. c. serving as a store of value. d. having intrinsic value.

Total revenue decreases as output increases when demand is:

A. downward sloping. B. perfectly elastic. C. price inelastic. D. price elastic.