To calculate the cost of putting up a deer fence around the entire square garden, you'll need to find the perimeter of the garden first. Since it's a square, you can find the perimeter by multiplying one side's length by 4.
Let's call the side length of the square "s."
Area of the square = s^2 = 144 square feet
So, s = √144 = 12 feet
Now, find the perimeter:
Perimeter = 4s = 4 * 12 = 48 feet
Now, you can calculate the cost of the fence:
Cost per linear foot = $3.50
Total cost = Cost per linear foot * Perimeter
Total cost = $3.50 * 48 feet = $168
It will cost $168 to put up the deer fence around the entire garden.