Question

How many significant digits are 6.3590x10 7 mm

Answer 1

If you go by the decimal there should be 5 significant digits because 0 is a trailing zero and matters since it comes after a decimal. however if you do 

6.3590 x 10 ^7 = 63590000 then you would only have 4 significant digits because there is no longer a decimal to make the zero after the 9, significant. 

Hope this helps!

Answer 2

Answer:

There are 5 significant digits

Explanation:

Significant digits are essentially numbers that contribute directly towards a measurement. There are certain rules to be followed while identifying the number of significant digits in a measurement, these include:

1) Non-zero digits are significant

2) Leading zeros are insignificant

3) Trailing zeros only after a decimal point are significant

4) Zeros in between non-zero digits are significant

The given value is:

6.3590*10⁷

There are 4 non-zero digits + 1 trailing zero after the decimal.

Therefore, significant digits are 4 +  1 = 5