Object a travels in the +x-direction before hitting a stationary object b. afterwards, object aís x-momentum is 5.7 _ 104 kilogram meters/second and its y-momentum is 6.2 _ 104 kilogram meters/second. what is the objectís resultant angle of motion with the +x-axis after the collision?

Below are the choices that can be found from other sources:

A. 42 
B. 45 
C. 47 
D. 48 
E. 49

The answer is C or 47. The object’s resultant angle of motion with the +x-axis after the collision is  47. The reason for that is from object A’s x-momentum is 5.7 × 104 kilogram meters/second and its y-momentum is 6.2 × 104 kilogram meters/second, we know that tan of the angle from the x-axis is 6.2 / 5.7 = 1.09 and acrtan 1.09 = 47.4

She should use 12/3 to measure