The original size of a 5 inch by 7 inch photo is 127 mm by 177.8 mm when converted to millimeters using the conversion factor of 25.4 millimeters per inch.
Step-by-step explanation:
The original size of a 5 inch by 7 inch photo needs to be converted into millimeters. To convert inches to millimeters, we use the fact that one inch is equal to 25.4 millimeters. Therefore, we multiply the length and the width of the photo by 25.4 to get the size in millimeters.
Conversion Steps
Multiply the length of the photo (5 inches) by 25.4 to get the length in millimeters.
Multiply the width of the photo (7 inches) by 25.4 to get the width in millimeters.
Let's do the math:
Length in millimeters: 5 in x 25.4 mm/in = 127 mm.
Width in millimeters: 7 in x 25.4 mm/in = 177.8 mm.
Thus, the original size of the photo in millimeters is 127 mm by 177.8 mm.