Answer:
To find the new width of the photograph, we need to multiply the original width by the scale factor of 2.6:
New width = Original width x Scale factor
New width = 3.6 in x 2.6
New width = 9.36 in (rounded to two decimal places)
Therefore, the new width of the photograph will be approximately 9.36 inches when both dimensions are enlarged by a factor of 2.6.