Options:
A.
B.
C.
D.
E.
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Earlier discussion
2 older comments kept for context.
Pius
The answer is A
One-millionth of a millimeter = 10\(^{-9}\)
1/10\(^6\) × 1/10\(^{-3}\) = one millionth of a millimeter
Therefore, 12000 micrometers = 12000 × 10\(^{-9}\)
= 12 × 10\(^3\) × 10\(^{-9}\)
= 12 × 10\(^{(3-9)}\)
= 12 × 10\(^{(-6)}\)
= 1.2 × 10\(^5\)
Prosper enwerem
Even From your explanation, 4 zeros should be before 1, therefore C is the correct answer 0.000012,