Solution:
Given that,
Kate wants to build a fence around her garden to prevent her rabbits from eating her vegetables
Given is a square garden
Area = 144 square meter
[tex]Area = (side)^2\\\\144 = (side)^2\\\\Take\ square\ root\ on\ both\ sides\\\\side = 12[/tex]
Thus length of side of square is 12 meter
Perimeter = 4(side)
Perimeter = 4(12)
Perimeter = 48 meter
[tex]Cost = perimeter \times 7.50\\\\Cost = 48 \times 7.50\\\\Cost = 360[/tex]
Thus it costs $ 360 to enclose a square garden with an area of 144 square meter