Answer:
The sum is
[tex]7.92\times 10^3[/tex]
Step-by-step explanation:
We want to add
[tex]4.9\times 10^2 and 6.8\times 10^3[/tex]
The sum of these two numbers is:
[tex]4.9\times 10^2 +6.8\times 10^3[/tex]
This is the same as:
[tex]4.9\times 100 +6.8\times 1000[/tex]
[tex]490 +6800=7290[/tex]
We rewrite 7290 in standard form to get;
[tex]7.92\times 10^3[/tex]
