To solve this problem, we add the two numbers together:
1.4271636864 x 10^9
+ 2.8722791173 x 10^9
When adding numbers in scientific notation, the coefficients (the numbers in front of the 10) are added together while keeping the same exponent.
So, the sum of the numbers is:
(1.4271636864 + 2.8722791173) x 10^9
= 4.2994428037 x 10^9
Therefore, the sum of the given numbers is 4.2994428037 x 10^9.
1.4271636864 x 10^9 + 2.8722791173 x 10^9
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