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Problem 4.1: What is the difference between a vector and a ray?
 
Problem 4.2: A vector has origin at (1,2) and endpoint at (-3,-4). What is the horizontal, or x-component of this vector?
 
Problem 4.3: How many vectors are needed to form the coordinate plane?
 
Problem 4.4: A vector has origin at (-3,5) and endpoint at (0,8). What is the magnitude of this vector?
 
Problem 4.5: . . What is 3?
 
 
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