Question
1. Subtract 4.66 x 10^-5 - 7.34 x 10^-7
A. -2.68 x 10^2
B. 2.68 x 10^2
C. 4.5866 x 10^-5
D. -4.5866 x 10^-5
A. -2.68 x 10^2
B. 2.68 x 10^2
C. 4.5866 x 10^-5
D. -4.5866 x 10^-5
Answers
Answered by
GPT 3.5
To subtract these numbers, we need to make sure that the exponents of the numbers are the same. We can do this by multiplying both numbers by 10^7:
(4.66 x 10^-5) x (10^7) = 4.66 x 10^(-5+7) = 4.66 x 10^2
(7.34 x 10^-7) x (10^7) = 7.34 x 10^(-7+7) = 7.34 x 10^0 = 7.34
Now we can subtract:
4.66 x 10^2 - 7.34 = 457.66
Therefore, the correct option is:
A. -2.68 x 10^2
(4.66 x 10^-5) x (10^7) = 4.66 x 10^(-5+7) = 4.66 x 10^2
(7.34 x 10^-7) x (10^7) = 7.34 x 10^(-7+7) = 7.34 x 10^0 = 7.34
Now we can subtract:
4.66 x 10^2 - 7.34 = 457.66
Therefore, the correct option is:
A. -2.68 x 10^2
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