Final answer:
To enlarge a photograph with original dimensions of 3 feet by 3 feet while maintaining the aspect ratio, each dimension needs to be doubled, resulting in a new size of 6 feet by 6 feet.
Step-by-step explanation:
The question involves finding the new dimensions of the enlarged photograph. Since the original photo's length and height are both 3 feet, we need to apply scaling to maintain the aspect ratio. By doubling the size of both length and height, we get a new length and height of 6 feet each. Therefore, to have a square photograph that is twice as large in area, both dimensions need to be doubled. This results in a new length and height of 6 feet each for the enlarged photograph.
In the context of home decorating or event planning, such as blowing up a photograph or selecting a banner size, it is essential to measure large spaces in feet for convenience and accuracy. Inches are too small for such tasks and miles are impractical for indoor measurements.