Question

how many number of significant figures in 4.278 x 104 ?

Answer 1

Answer:

There are 4 significant figures in number  $4.278 X 10^{4}$

Explanation:

Rules

Rule 1: Non-zero digits are always significant.

Rule 2: Any zeros between two significant digits are significant

Rule 3: A final zero or trailing zeros in the decimal portion ONLY are significant.

What Zeros are Not Discussed Above

Zero Type #1: Space holding zeros on numbers less than one.

Zero Type #2: the zero to the left of the decimal point on numbers less than one.

Zero Type #3: trailing zeros in a whole number.

Zero Type #4: leading zeros in a whole number