A parallel line must have the same slope. The only one it can be is A
To understand the problem, let's first draw a free body diagram of the forces exerted by Judy and Ike on the truck. (Refer to the left side of the attachment).
To solve for the resultant, we just use the tip-to-tail method. This is illustrated on the right side of the attachment.
We can see that the tip-to-tail method forms a right triangle thus we can just apply the Pythagorean theorem in solving for Ike's force.
![20^{2} = 12^{2} + F^{2}](https://tex.z-dn.net/?f=%2020%5E%7B2%7D%20%3D%2012%5E%7B2%7D%20%2B%20F%5E%7B2%7D%20)
![400 = 144 + F^{2}](https://tex.z-dn.net/?f=%20400%20%3D%20144%20%2B%20F%5E%7B2%7D%20)
![256 = F^{2}](https://tex.z-dn.net/?f=%20256%20%3D%20F%5E%7B2%7D%20)
ANSWER: Ike must pull the truck with a force of 16.0 N.
The ratio A/r² would represent
![\pi](https://tex.z-dn.net/?f=%20%5Cpi%20)
which is the circumference of a circle divided by its diameter.
You can see this because the area of a circle is
![\pi](https://tex.z-dn.net/?f=%20%5Cpi%20)
r² and if you divided that by the radius squared, you are given pi which is the circumference of a circle divided by its diameter.
The answer is 489,300.
Work:
We go to the tenth's place, which is 9. Since 9 is higher than 5, we need to round the hundredth's place to 3.
The answer is 3930.
All you have to do is multiply 131,000 * 3 and then divide that by 100.
Hope that helps!