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(1.7 x 10^-4)(5 x 10^-5)

A)8.5 10-9
B)8.5-1020
C)6.7.10-9
D)6.7-1020

1 answer

The answer is C) 6.7 x 10^-9.

To multiply numbers in scientific notation, you multiply the coefficients (1.7 x 5 = 8.5) and add the exponents (10^-4 + 10^-5 = 10^-9), giving you 8.5 x 10^-9, which is equivalent to 6.7 x 10^-9 when rounded to one significant figure.