Give the number of significant figures in the measurement (superscript -3 for #1, and superscript 3 for #2)

1)3.85 X 10-3
2)17.30 cm3
3)0.0037 mm

1. 3 significant figures.
2. 4 s.f.
3. 2 s.f.
Here is a good site to review.
http://members.aol.com/profchm/sig_fig.html

3.85 ! 10"3

dm

To determine the number of significant figures in a measurement, follow these steps:

1) Count all the digits from the first non-zero digit on the left to the last non-zero digit on the right. The zeros between non-zero digits are also significant.

2) If there is a decimal point present, continue counting all the digits after the decimal point, including trailing zeros.

Let's go through each measurement:

1) 3.85 x 10^(-3)
The significant figures are 3, 8, and 5. There is no decimal point. So, the number of significant figures is 3.

2) 17.30 cm^3
The significant figures are 1, 7, 3, and 0. There is a decimal point and trailing zero(s) after the 0. So, the number of significant figures is 4.

3) 0.0037 mm
The significant figures are 3 and 7. There is a decimal point and trailing zero(s) after the 7. So, the number of significant figures is 2.

Remember, trailing zeros before the decimal point are not significant figures. If you need further assistance or want to review more examples, you can visit the following website: http://members.aol.com/profchm/sig_fig.html