Significant Figures in 0.0000135:

There are two ways to count significant figures in a number. The first method is to count all the digits in the number, except those leading zeros that come before the first non-zero digit. The second method is to count the number of digits that are known with certainty, plus one uncertain digit.

Method 1:

Using the first method to count significant figures in 0.0000135, we start counting from the first non-zero digit, which is 1. We count all the digits after that until we reach the end of the number. In this case, we count 3, 5, and the trailing zero. Therefore, the number of significant figures in 0.0000135 is 3.

Method 2:

Using the second method to count significant figures in 0.0000135, we start with the digit that is known with certainty, which is 1. We then count all the digits after that, which are 3 and 5. We also count one uncertain digit, which is the last zero. Therefore, the number of significant figures in 0.0000135 is 4.

Conclusion:

In conclusion, the number of significant figures in 0.0000135 is 3 or 4, depending on the method used to count them. If method 1 is used, the answer is 3, and if method 2 is used, the answer is 4. It is important to note that significant figures are important in scientific calculations because they indicate the precision of the measurement or calculation.

3 significant figures because zeros coming before non zero digits are not significant