Question

Which expression has the fewest significant figures?

Answer 1

Answer:

d

Step-by-step explanation:

Answer 2

Hello!

Here are some rules to determine the number of significant figures.

1. Numbers that are not zero are significant (45 - all are sigfigs)
2. Zeros between non-zero digits are significant (3006 → all are sigfigs)
3. Trailing zeros are not significant (0.067 → the first two zeros are not sigfigs)
4. Trailing zeros after a decimal point are always significant (1.000 → all are sigfigs)
5. Trailing zeros in a whole number are not significant (7800 → the last two zeros are not sigfigs)
6. In scientific notation, the exponential digits are not significant, known as place holders (6.02 x 10² → 10² is not a sigfig)

Now, let's find the number of significant figures in each given number.

A). 296.54

Since these digits are all non-zero, there are 5 significant figures.

B). 5003.1

Since the two zeros are between non-zero digits, they are significant figures. Thus, there are 5 significant figures.

C). 360.01

Again, the two zeros are between non-zero digits. There are 5 significant figures.

D). 18.3

All of these digits are non-zero, hence, there are 3 significant figures.

Therefore, expression D has the fewest number of significant figures being 3.