If astronauts travel from Earth to the moon ( smaller than the Earth ) , what can be said about their mass and weight? A. Their mass and weight would both change
B. Their mass would increase but their wight would decrease.
C. their mass would stay the same but their wight would decrease.
D. Their mass and weight would both increase.

Their mass would remain the same but their weight would change.

Explanation:

Mass is density times volume times density, so gravity wouldn't affect it, but since the moons gravitational pull is less than that of Earth their weight would change.

i think the answer is a, hope this : )

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west