Question

evaluate. express your answer in scientific notation.
$8.2 \times 10^{-1} + 1.3 \times 10^{-3}$

Explanation:

Step1: Rewrite to same exponent

$8.2 \times 10^{-1} = 820 \times 10^{-3}$

Step2: Add the coefficients

$820 \times 10^{-3} + 1.3 \times 10^{-3} = (820 + 1.3) \times 10^{-3}$

Step3: Simplify the sum

$821.3 \times 10^{-3}$

Step4: Convert to scientific notation

$8.213 \times 10^{-1}$

Answer:

$8.213 \times 10^{-1}$