Question

how many significant digits does the following value have?
0.002110

question 7 2 pts
how many significant digits does the following value have?
51,015

question 8 2 pts
how many significant digits does the following value have?
0.0007

Explanation:

For 0.002110:

Step1: Recall significant digit rules

Leading zeros are not significant. Non - zero digits are significant. Trailing zeros after a decimal are significant.
For 0.002110, the leading zeros (the three zeros before 2) are not significant. The non - zero digits 2, 1, 1 are significant, and the trailing zero after the decimal is also significant.

Step2: Count the significant digits

Count the significant digits: 2, 1, 1, 0. So there are 4 significant digits.

Step1: Recall significant digit rules

All non - zero digits are significant. Zeros between non - zero digits are significant.
In 51.015, the digits 5, 1, 0, 1, 5 are all significant. The zero is between 1 and 1, so it is significant.

Step2: Count the significant digits

Count the digits: 5, 1, 0, 1, 5. There are 5 significant digits.

Step1: Recall significant digit rules

Leading zeros are not significant. Non - zero digits are significant.
In 0.0007, the leading zeros (the four zeros before 7) are not significant. The non - zero digit 7 is significant.

Step2: Count the significant digits

There is 1 significant digit.

Answer:

4

For 51.015: