To add these two numbers, we need to first make sure they have the same power of 10.
1.34 × 10e9 = 1.34 × 10^9 (since e is equivalent to exponent notation)
6.521 × 10e9 = 6.521 × 10^9
Now we can add them:
1.34 × 10^9 + 6.521 × 10^9 = 7.861 × 10^9
Therefore, the sum of (1.34 × 10e9) + (6.521 × 10e9) is 7.861 × 10^9 in scientific notation.