Question

Give the number of significant figures: 369,132,000 sec

Answer 1

Answer : The number of significant figures in 369132000 sec are, six (6).

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

Rules for significant figures are :

• Digits from 1 to 9 are always significant and have infinite number of significant figures.
• All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant figures.
• All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.
• All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.
• All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.
• All zeroes used solely for spacing the decimal point are not significant. For example : 8000 has one significant figure.

As per question,  

The given number is, 369,132,000

According to the rule, all zeroes used solely for spacing the decimal point are not significant. So, the number of significant figures in 369,132,000 are, 6.

Hence, the number of significant figures in 369132000 sec are, six (6).

Answer 2

The number of significant figures in 369,132,000 is 6