4:07 myopenmath.com Question 3 0/1 pt 9 3 99 @ Details Let u = (-1, 2, -3) and U = (1, 5, -5) . Compute the following: U . v = v . u = 4 ( 7 . 7 ) = (4u) . v = u . (47) = = 1(2 . n) Submit Question O Question 4 0/1 pt 9 3 99 0 Details Let v = 2i + 3j and w = 2i + 9j. Find an exact number c so that w - cu is perpendicular to U. Submit Question Find Angle between two vectors Question 5 0/1 pt 9 3 99 0 Details Let a = (3, 5, -1) and b = (3.0-1). Question 4 0/1 pt 9 3 99 0 Details Let 7 = 21 + 3j and w = 2i + 9j. Find an exact number c so that w - co is perpendicular to U. C Submit Question Find Angle between two vectors