Answer: Unit of account 
Store of value 
Medium of exchange 
Explanation: Money has three functions: 
Unit of account 
Store of value 
Medium of exchange
Unit of Account- Money can be used as a measure in determining value of goods and services. Norah compared the price of the dress to determine the dress costs less.
Store of value- money retains it value over periods of time, therefore it can be used to store value. Norah is saving money in a piggy bank.
Medium of exchange - money is used to facilitate transactions: it can be used to exchange for goods and services. Norah exchanged money for a dress. 
I hope my answer helps.