Réponse:
4 inches
Explications étape par étape:
The enlargement of the photo is determined by the ratio of the new length to the original length.
original photo = 6 inches long
the customer wants to enlarge it to 24 inches.
So, the enlargement ratio is 24/6=4
for every inch of the original photo, the shop will enlarge the photo by 4 inches. So, the enlargement will be 4 inches for every inch.