math
posted by Kyle on .
anoter poster reproduces the Mona Lisa in the original size, but adds a 4 1/2 inch border around each side. What is the perimeter of this poster if the length is 30 3/10" and width is 20 7/8"?

p = 2(w+l)
= 2(30 3/10 + 20 7/8)
= 2(30 15/40 + 20 35/40)
= 2(50 50/40)
= 100 + 100/40
= 102 1/2