Calculate \( \left(2.6 \times 10^{8}\right)+\left(3.1 \times 10^{8}\right) \) Give your answer in standard form.

To add the two numbers in scientific notation, we can first express them with the same base of \(10^8\): \[ (2.6 \times 10^{8}) + (3.1 \times 10^{8}) = (2.6 + 3.1) \times 10^{8} \] Calculating the sum inside the parentheses gives us: \[ 2.6 + 3.1 = 5.7 \] Therefore, we can combine it back into scientific notation: \[ 5.7 \times 10^{8} \] So, the answer in standard form is: \[ \boxed{5.7 \times 10^{8}} \]