A Firecracker Breaks Up into Two Pieces, One Has a Mass

Multiple Choice

A firecracker breaks up into two pieces, one has a mass of 200 g and flies off along the x-axis with a speed of 82.0 m/s and the second has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s. What is the total momentum of the two pieces?

A) 361 kg∙m/s at 56.3° from the x-axis
B) 93.5 kg∙m/s at 28.8° from the x-axis
C) 21.2 kg∙m/s at 39.5° from the x-axis
D) 361 kg∙m/s at 0.983° from the x-axis
E) 21.2 kg∙m/s at 56.3° from the x-axis