Answers by visitors named: Gummy Bear

Thank you. So much,I honestly appreciate you helping me.

I'm sorry. I had to use my laptop to type all of this and yes #1 was suppose to be 13[6^2(5^2-4^2)+9] sorry, so was #1 the answer I assumed was wrong? how about A that was my first guess but I calculated it and it led me somewhere near B.585 so am I corr...

For #3 is 1 wrong or both?