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Answer :
Final answer:
To write measurements in scientific notation, identify significant figures, count decimal places, move the decimal point, and write the number with an exponent of 10.
Explanation:
To write measurements in proper scientific notation with the correct number of significant digits, follow these steps:
- Identify the non-zero digits in the given measurement as significant figures.
- Count the number of decimal places in the measurement. If there is no decimal point, assume it is at the end of the number.
- Move the decimal point to create a number between 1 and 10.
- Count the number of places the decimal point moved. This will be the exponent of 10.
- Write the number in scientific notation by multiplying the decimal part by 10 raised to the power of the exponent.
Using these steps, the measurements can be written as:
- 2.0 x 10-3 m
- 2.451 x 103 km
- 4.2 x 10-11 g
- 7.0 x 100 g
- 4.54845 x 106 kg
- 1.45 x 102 kg
- 3.0 x 10-1 m
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