To multiply two numbers written in scientific notation, you multiply their coefficients and add their exponents. So, (3.9 x 10^-1) x (7.2 x 10^-1) can be calculated as:
(3.9 x 7.2) x (10^-1 x 10^-1)
= 28.08 x 10^-2
Therefore, (3.9 x 10^-1) x (7.2 x 10^-1) equals 28.08 x 10^-2.
(3.9 x 10^-1) x (7.2 x 10^-1)
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