Final answer:
The sum of 6.2831853 x 10^11 is 6.2824 x 10^11 + 7.853 x 10^7.
Step-by-step explanation:
The sum of two numbers in scientific notation can be found by adding the coefficients and keeping the same exponent. In this case, the sum of 6.2831853 x 1011 is the same as the sum of (6.2824 x 1011) and (7.853 x 107).
To verify, we can add them:
6.2824 x 1011 + 7.853 x 107 = 628240000000 + 78530000 = 628318530000
So, 6.2831853 x 1011 is the sum of 6.2824 x 1011 and 7.853 x 107.