Foster is centering a photo that is 3 1/2 inches wide on a scrapbook page that is 12 inches wide. how far from each side of the page should he put the picture?

This means that we have to didvide the 12 inches wide side into 3 parts: one of 3.5 inches, and two other, of equal size (the margins).

the margins together will have (12-3.5=8,5) inches, which means that each of them will hace half of this: so we have to divide 8.5 into 2.

this is: :

8.5/2=4.25

so he has to to put it 4.25 inches from each side.

Igot the answer of 15.8 years.