There is a Math website that has a lot of Calculus story problems. He shows you how to solve problems.
patrickjmt.com
also on Youtube;
Patrickjmt channel. The Yourmathgal channel is also good,
both have over 800
videos. Have gone to
both since 2011.
Due to the order of operations the correct answer is 6+2*5=16
18 ? am not really sure tho its kinda difficult lol
The answer is D hope this helps