Multiply 0.75 by 2.8×10^−5 (1 point)

A. 2.1×10^−5

B. 2.1×10^−7

C. 2.1×10^−6

D. 2.1×10^−4

5 answers

To multiply 0.75 by 2.8×10^−5, we multiply their decimal parts and add their exponents.

0.75 * 2.8 = 2.1

10^0 * 10^(-5) = 10^(-5)

Thus, the result is 2.1×10^−5.

So, the answer is A. 2.1×10^−5.
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