Answer:

Step-by-step explanation:
To help us find our answer, we need to use Newton's Second law

Where F is the force (N), m is the mass (Kg) and a is the acceleration (m/s^2, on a planet this would just be the gravity)
So if we know that a person has a mass of 3Kg and weighs 30N, the acceleration (or the gravity on that planet is)

Now that we know the acceleration we can easily find the weight of the person.

Answer:
b
Step-by-step explanation:
because if you square root 30, the value is: 5.477225575, it is neither 5.4 and 5.5
I've heard this before, submit the rest and I will attempt to solve.