Calculate \( \left(4.3 \times 10^{14}\right)+\left(8 \times 10^{12}\right) \)

To solve \( \left(4.3 \times 10^{14}\right) + \left(8 \times 10^{12}\right) \), we first need to express both numbers with the same exponent. We can rewrite \( 8 \times 10^{12} \) as \( 0.08 \times 10^{14} \) (since \( 10^{12} \) can be converted to \( 10^{14} \) by moving the decimal point two places to the left). Now the expression looks like this: \[ 4.3 \times 10^{14} + 0.08 \times 10^{14} \] Next, we can add the coefficients: \[ (4.3 + 0.08) \times 10^{14} = 4.38 \times 10^{14} \] So the final answer is: \[ \boxed{4.38 \times 10^{14}} \]