Final answer:
To find the dimensions of the enlarged photo, multiply the dimensions of the original photo by the scale factor. In this case, the enlarged photo will have dimensions of 8 inches by 12 inches.
Step-by-step explanation:
To find the dimensions of the enlarged photo, we need to determine the dimensions of the original photo first. The area of the new picture is 4 times the area of the original photo, which means the dimensions are scaled up by a factor of 2. If the original photo is 4 inches by 6 inches, then the enlarged photo will have dimensions of 4 inches x 2 = 8 inches by 6 inches x 2 = 12 inches.