\fPrevious Page Next Page Question 4 (1 point) If a = [5, -4, 3] and b = [-2,3,k], find k such that a and b are orthogonal. O-1 O O O 22 3Previous Page Next Page Question 5 (1 point) A ship is on a heading of 240 at 15 knots. Write this velocity as a Cartesian vector. O [-15, -15] O [-12.99, -7.5] O [-12.99, 7.5] O 1-7.5, -12.99] Previous Page Next PagePrevious Page Next Page Question 7 (1 point) Which vector is not perpendicular to [3, -4]? [ 4, - 3] [ 4, 3] [8, 6] O [1, 0.75] Previous Page Next Page\fPrevious Page Next Page Question 6 (1 point) If la| = 3, |b) = 5, and the angle between a and b is 450, find ab O O 15V/2 O 15 V2 13, 5] Next PagePrevious Page Next Page Question 3 (1 point) If a = [2,3] and b = [5,-2], find ab 31 O V377 O - 60 4 Previous Page Next Page