Yes, those are correct.
An astronaut on a strange planet has a mass of 80 kg and a weight of 240 N. What is the value of the acceleration due to gravity on this planet?
F = ma
240 = 80 x a
80 80
A= 3 m/s^2
Next one question
What is the mass of a cart that has an acceleration of 4 m/s^2 when a net force of 2000 N is applied to it?
F = ma
2000=m(4)
2000 = 4m
4 4
m= 500kg
Did these need to know if this right or wrong?