Answer:
The sum of both numbers is 4.08 × 10^7
Explanation:
The sum of 3.15 × 10^7 and 9.3 × 10^6.
There is the need to write this out in their full form, that is;
31,500,000 + 9,300,000 = 40,800,000
This answer can then be converted to the scientific notation of;
4.08 × 10^7
Another way to do this is to make the power side of the two given scientific notations to have the same power, preferably the higher power.
3.15 × 10^7 = 3.15 × 10^7
9.3 × 10^6 = 0.93 × 10^7
We can then add this together since the power term (10^7) is the same as (3.15 + 0.93) × 10^7 = 4.08 × 10^7