A porch that is 24.5 feet long needs to be lengthened by 12.2 feet. How long is the new length of the porch?

36.7 feet (24.5+12.2). You just have to add the two numbers to determine the new length.

1.3 and 1 1/3 are both closest to 1. hope this ; )

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer