What happens when two forces act in the same direction?
a. they cancel each other out.
b. the stronger one prevails.
c. their strengths are added.
d. their sum divided by two is the total force.

If this is a question regarding vectors, I would say that you are to add the 2 forces, since they are going in the same direction. if they were going opposite directions, you would have to subtract one from the other. this can best be explained from a mechanical physics YouTube video.

Yes i think so not 100 percent sure though

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.