Amy has a mass of of 50 kg, and she is riding a skateboard traveling 10 m/s . what is her momentum?
a) 50 kg*m/s
b) 500 kg*m/s
c) 5 kg*m/s
d) 10 kg*m/s
(there is 4 other questions if someone can ? )

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.