I say the mass is farthest from the origin at the point (8, 4). [ATTACH=full]2153[/ATTACH] [ATTACH=full]2154[/ATTACH] Textbook answer for Part (c): t = 0, t = 2, t = 4, t = 6, and t = 8. In other words, the even numbers in the interval [0, 8]. Why is my answer wrong?