What are the three roles of money in an economy

The three functions/roles of money in an economy are:

1) Medium of Exchange: When money are used to intermediate exchange of goods and services.

2) Unit of Account: Standard numerical unit of measurement of market value goods, services, or other transaction. Money must be divisible into smaller units without loss of value and a specific weight or size to be verifiably countable.

3) Store of Value: To act as a store value,money should be reliably saved, stored, and retrieved. It also must be predictably usable as a medium of exchange when it is retrieved.

answer: 11/12

step-by-step explanation: 4 1/4 and 3 1/3 is equivalent to 4 3/12 and 3 4/12. 4 3/12 - 3 4/12 =11/12

i would say iii (3) because in order to compare a price you have to use as a reference other near stores because it's its

hope i explained myself