The first one is "unit of account".
The second one is "store of value".
The third one is "medium of exchange".
The answer is 12/13 in fraction form or 92% as a percent
C. 2 is the difference of the values of the two variables in the system of equations hope this helps!
7.5 divided by 1.5 is 5 so there are 5 lifeguards throughout the day.
