Exponents, Ex- 2B

Question

Can anyone please tell me the answer of the question which is visible? (*I know the hint is given but what SHALL I do if I don't able to understand that also?.....) 

Answer 1

barbie5878, hello

We want to add: 5.97x10²⁴ + 7.35x10²²

First we re-write the mass of the earth by breaking down 10²⁴ as 10² x 10²²

This gives us: 5.97x10²x10²² + 7.35x10²²

Now we factor out 10²²

This gives us: (5.97x10² + 7.35) x 10²²

Or: (597 + 7.35) x 10²²

Which is: (604.35) x 10²²

Ans can be simplified: (6.0435 x 10²) x 10²²

As: 6.0435 x 10²⁴

Please let me know if this helps