Answer:
36 ft²
Step-by-step explanation:
Scale factor means the side length are multiplied by some value. Here, Jack takes 4 feet and multiplies it by a value of 1 1/2.
The side length he wants is one and a half times the length of his neighbor's.
The 'one' means the side length you started with, and the 'one half' means add half to the original length.
one and a half of four is six. (4 plus half of 4, which is 2, so 4 plus 2)
The box is square, so each side is 6 ft, so the area of the box is 6x6 = 36 ft²