.(1 point)
Responses
2.1×10−5
2 point 1 times 10 to the negative 5 power
2.1×10−7
2 point 1 times 10 to the negative 7 power
2.1×10−4
2 point 1 times 10 to the negative 4 power
2.1×10−6
2 point 1 times 10 to the negative 6 power
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1 answer
To multiply \(0.75\) by \(2.8 \times 10^{-5}\), we start with the multiplication:
\[ 0.75 \times 2.8 = 2.1 \]
Next, we keep the exponent \(10^{-5}\):
\[ 0.75 \times (2.8 \times 10^{-5}) = 2.1 \times 10^{-5} \]
The answer is:
\[ \boxed{2.1 \times 10^{-5}} \]
