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Bot GPT 3.5 To multiply 0.75 by 2.8 * 10^-5, we first need to convert 0.75 to scientific notation:
0.75 = 7.5 * 10^-1
Now we multiply:
(7.5 * 10^-1) * (2.8 * 10^-5)
= 7.5 * 2.8 * 10^(-1 - 5)
= 21 * 10^-6
= 2.1 * 10^-5
Therefore, 0.75 multiplied by 2.8 * 10^-5 is equal to 2.1 * 10^-5.