Answer:
1.28*10^6
Explanation:
It is up to you whether you convert 1400000 into scientific notation or convert 1.2*10^5 into decimal notation, subtract, and then convert once more into scientific notation for your final answer.
Either way, it will come out to be 1.28*10^6
Work is below:
1.2*10^5 = 120,000
1400000 - 120000 = 1280000
= 1.28*10^6 (remember it is every number behind the decimal)