Planet A has twice the mass of Planet B. From this information, what can we conclude about the acceleration due to gravity at the surface of Planet A compared to that at the surface of Planet B?

We cannot conclude anything about the acceleration due to gravity on Planet A without knowing the radii of the two planets.

Explanation:

This is so because

acceleration due to gravity (g) = Gm/r²

Where G= Newton's gravitational constant

              = 6.67 x 10-11 N * m2 / kg2.

             m = mass of the planet (in kg)  

              r = radius of the planet ( in m)

i think it's 35 meters