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A man in search of his dog drives first 11 mi northeast, then 28 mi straight south, and finally 4 mi in a direction 30° north of west. What are the magnitude and direction of his resultant displacement? magnitude = ??? direction = ??? (° south of east)

I'm majoring in computer science in college, which requires the logical abilities of math and science. I'll need physics credits in order to graduate. Since I don't have that much knowledge in physics, how well do you think I'll be able to learn it and keep up in college? Anyone else have...