Answer: 7 significant digits
Step-by-step explanation:
Significant digits.: 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:
Digits from 1 to 9 are always significant and have infinite number of significant digits.
All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant digits.
All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant digits.
All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant digits.
All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant digits
Thus 204.0920 has 7 significant digits.