Answer:
9.49 units at an angle of 71.6° with the horizontal
Step-by-step explanation:
Magnitude: [x^2 + y^2]^(1/2)
(3^2 + 9^2)^(1/2)
(90)^(1/2) = 3root(10) = 9.49
Direction:
Angle with the horizontal: tan inverse (y/x)
tan inverse of (9/3)
tan inverse of 3 = 71.6°
