Question

the mass of Neptune is about 1 x 10^26 kilograms. the mass of jupiter is about 2 x 10^27 kilograms. how man times heavier is jupiter than neptune

Answer 1

To find how much bigger it is, divide the mass of jupiter, over the mass of neptune.
2 x 10^27
________
1 x 10^26                    = 2 x 10 (because you subtract exponents when you divide them)
So 20 times heavier.
Hope this helps.