What is the sum of 4.2 × 105 and 5.3 × 105?

Question

Group of answer choices

95 × 105

95 × 1010

9.5 × 105

9.5 × 1010

Answer 1

To find the sum of \(4.2 \times 10^5\) and \(5.3 \times 10^5\), we first add the coefficients while keeping the common exponent:

\[ 4.2 + 5.3 = 9.5 \]

Thus, we can rewrite the sum as:

\[ 9.5 \times 10^5 \]

Therefore, the answer is:

\[ \boxed{9.5 \times 10^5} \]