Question

question
evaluate. express your answer in scientific notation.
3.91 × 10^5+7.43 × 10^6
answer attempt 1 out of 5
answer: ×10

Explanation:

Step1: Make exponents the same

Rewrite $3.91\times 10^{5}$ as $0.391\times 10^{6}$.

Step2: Add the coefficients

$(0.391 + 7.43)\times10^{6}=7.821\times 10^{6}$

Answer:

$7.821\times 10^{6}$