Question

find the magnitude and direction of the vector. round the length to the nearest tenth and the degree

Answer 1

just find the length of the hyp

Answer 2

for magnitude

Answer 3

you can use pythagorean theorem

the angle there is in the 3rd quadrant
so if you calculate arctan(y/x) you will get the angle in the 1st
so if you add 180 deg to that result then you will have the theta in the 3rd quadrant which is where we are suppose to be