Question 12
Fractions, Decimals and ApproximationA micrometre is defined as one millionth of a millimetre. A length of 12,000 micrometres may be represented as
- A.0.00012m
- B.0.0000012m
- C.0.000012m
- D.0.00000012m
- E.0.000000012m.
Show the answer and explanation
Answer: C (0.000012m)
Explanation
Using the question's definition, 12,000 micrometres = 12,000 ÷ 1,000,000 mm = 0.012mm, and 0.012mm ÷ 1000 = 0.000012m.