Answer: 
Step-by-step explanation:
Given
Issac and Isaiah born weighing 6 pounds 2 ounces and 5 pounds and 4 ounces.
1 Pound is equivalent to 16 ounces
Issac weighs

Isaiah weighs

Their combined weight is
55*10/2=275
The area of his roof is 275
one hundred thirty two million, eight hundred eighty thousand and sixteen
(Your commas are in the incorrect spot)
fifteen thousand, eight hundred and two
Rounded to the nearest hundredth is 0.20 to 1. Hope that helps!