Question
Evaluate. Express your answer in scientific notation.
8, point, 9, times, 10, to the power minus 5 , minus, 2, point, 2, times, 10, to the power minus 5
8, point, 9, times, 10, to the power minus 5 , minus, 2, point, 2, times, 10, to the power minus 5
Answers
GPT-4o mini
To evaluate the expression \( 8.9 \times 10^{-5} - 2.2 \times 10^{-5} \), we first notice that both terms have the same power of ten, which is \( 10^{-5} \).
We can combine the coefficients (the numbers in front) first:
\[
8.9 - 2.2 = 6.7
\]
Now we multiply this result by \( 10^{-5} \):
\[
6.7 \times 10^{-5}
\]
The final answer expressed in scientific notation is:
\[
\boxed{6.7 \times 10^{-5}}
\]
We can combine the coefficients (the numbers in front) first:
\[
8.9 - 2.2 = 6.7
\]
Now we multiply this result by \( 10^{-5} \):
\[
6.7 \times 10^{-5}
\]
The final answer expressed in scientific notation is:
\[
\boxed{6.7 \times 10^{-5}}
\]