There are three significant digits. I am not sure what scientific digits are!
There is no such thing as scientific digits. There are 6 digits in the number of which 3 are SIGNIFICANT (not scientific) digits.
5.4 x 102.
540 what?
There is no way to know how many significant digits are in 33000. If you are forced to choose then there are 2 significant digits but, again, there is really no way to tell. If the count of significant digits is important, the number should be expressed in scientific notation.
One
one
scientific it is called digits
The answer depends on what 540 refers to.
540 ÷ 60 = 9
270 of them.
In scientific notation, you should have only one digit to the left of the decimal point.
Yes they are, if they are large numbers. You do not need to count how many digits there are.