Express your answer in scientific notation.
8.3 × 109 − 2.1 × 107
(1 point)
Responses
−8.279 × 109
−8.279 × 109
6.20 × 102
6.20 × 102
8.279 × 109
8.279 × 109
−6.20 × 102
To subtract these numbers in scientific notation, we need to have the same exponent.
8.3 × 10^9 - 2.1 × 10^7 can be rewritten as:
8.3 × 10^9 - 0.021 × 10^9 (since 2.1 × 10^7 can be represented as 0.021 × 10^9)
Now, we can subtract the numbers:
8.3 × 10^9 - 0.021 × 10^9 = 8.279 × 10^9
Therefore, the answer in scientific notation is 8.279 × 10^9.