Question

How many significant digits are in the number 101.0100? A. 4 B. 5 C. 6 D. 7

Answer 1

The correct answer in B)5 because the two zeros that follow one on the right side of the decimal place are not important and can be easily taken out and the number would still be the same. An example of this is 2.50. If you take away the zero it will equal 2.5 which is the same number as 2.50.

Answer 2

The correct option is C.

Step-by-step explanation:

There are some general factors to be considered when determining significant digits in numbers with decimal point.

• All non-zero digits ARE considered significant (hence the three "1" ARE significant).
• Zero between non-zero digits ARE also considered significant (hence the single "0" between the two "1" before the decimal point IS significant).
• The first zero(s) to the left before a non-zero digit (in whole numbers or after decimal) IS NOT significant (hence, the "0" after the decimal before the "1" IS NOT significant).
• Where there is a decimal, the zeros to the far right after the decimal ARE significant (hence, the two "0" after the "1" ARE significant)

Hence, 3 + 1 + 2 = 6