Answer:
63.1
Step-by-step explanation: You divide 315.5 by 5 to get the answer
By definition, the area of a square is given by:

Where,
L: length of the square side
For this case, the length of the square side is given by:

Substituting values we have:

Answer:
the calendar area is:

Simple Interest
He will have saved $1,945.60 after 12 years
175 divide by 25 should be 7
then using 80 divide by 40 is 2
7+2=9
then 2 times 40, and 7 times 25, the result is 285
285 divide by 9 get 31.6666......... or 31.7