Given vector u with components three comma two , vector v with components one comma five , and the angle between the vectors is 45 degrees , what is vector u times vector v ?

The product of two vectors here is their dot product: multiply corresponding components and add. Thus u · v = (3)(1) + (2)(5) = 3 + 10 = 13, so the correct choice is 13. The given 45° angle is consistent with these vectors but is not needed for this calculation.

AI-written and checked against the verified answer.