Question

question
evaluate. express your answer in scientific notation.
$8.5 \times 10^{-7} - 5.7 \times 10^{-7}$
answer
answer: $\square \times 0^{\square}$

Explanation:

Step1: Factor out common term

$8.5 \times 10^{-7} - 5.7 \times 10^{-7} = (8.5 - 5.7) \times 10^{-7}$

Step2: Subtract the coefficients

$8.5 - 5.7 = 2.8$

Step3: Combine with the power of 10

$2.8 \times 10^{-7}$

Answer:

$2.8 \times 10^{-7}$