Responses
2.1×10^−4
2 point 1 times 10 to the negative 4 power
2.1×10^−7
2.1
×
10
−
7
2 point 1 times 10 to the negative 7 power
2.1×10^−5
2.1
×
10
−
5
2 point 1 times 10 to the negative 5 power
2.1×10^−6
3 answers
To multiply \( 0.75 \) by \( 2.8 \times 10^{-5} \), we first multiply the decimal and the coefficient from the scientific notation:
\[ 0.75 \times 2.8 = 2.1 \]
Next, we keep the \( 10^{-5} \) part the same:
\[ 2.1 \times 10^{-5} \]
Thus, the final answer is:
\[ 2.1 \times 10^{-5} \]
So the correct response is:
2.1×10^−5
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