How many significant figure does 100.0 have?

Answer 1

It depends on how it is written. Strictly speaking, 10 has only one significant digit (1000 also has one significant digit). However, 10.00 has four significant digits. If you wanted to make the zero in 10 significant, a decimal needs to be placed after the zero; alternatively, a bar can be placed above the zero.

ANS2:Since the ten did not come with units, it may be an exact count. If it is an exact count, it is infinitely precise. If you had exactly (see, you can't say "exactly" with a measurement) 10 rulers that were 10.00 cm long, the total length of all of them laid end-to-end would not be any more precise than the hundredths place. Your final answer would be 100.00 cm because in adding, you can have no greater precision than your least precise term. The least precise term is not the infinitely precise count.

10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm + 10.00 cm = 100.00 cm

That is assuming you added. If you multiplied, you can have no more significant digits than the term with the fewest significant digits.

10 x 10.00 cm = 100.0 cm.

Not all counts are exact. "Ten, give or take one" would carry precision the same as 10 cm with no bar over the zero. It would be precise to the tens place.

Answer 2

There are five significant figures in the number 100.10. All zeros between digits are significant, and zeros to the right of a decimal point are signficant.

Answer 3

There are 5 significant digits in 10000. If, however, 10000 were stated as 1x105, there would have only been 1 significant digit.

Answer 4

100.0 has three significant figures left of the decimal point.

-Ahem! And one to the right.

Answer 5

Three of them.

Answer 6

Five

Answer 7

5 of them.

Answer 8

5 of them.

Answer 9

5.

Answer 10

Five.