# how many significant figures are in 75000.0? and why? ?

### 7 Answers

- Jim MoorLv 74 weeks ago
6

Since there is a decimal, there is no question that all digits are significant.

- 4 weeks ago
This is quite simple. Since 75000.0 has a decimal, all digits after the decimal count as sig figs, and so do all digits that are before the decimal point. Therefore, 75000.0 would have 6. If your number was 75000, there would be different since there is no decimal point. If there's no decimal point, there would only be 2, becuase the 3 zeros at the end wouldn't count.

- Anonymous4 weeks ago
There are six significant figures. It's because there's a decimal. Significant figures are used to account for errors or estimates in reading measurements. When you have a decimal it shows that the reading was done at the tenths place (or hundredths place or whatever). If it was just 75000 without the decimal, that could mean that the the reading was taken in the thousands. Like looking at a graph that is only marked at every thousand or ten thousand units, so the values for the hundreds or thousands place are just estimated by eye-balling it.

Just remember as a rule that if there is a decimal, you count the zeros.

True @Lon... the decimal rule only applies to trailing zeros, not if the number begins with zeros

this is a great answer thx bro

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- GA41Lv 74 weeks ago
Looks like six to me. Because the number is presented in 10,000's which has 5 digits, but they have carried it to 1 decimal place (0.1) which gives you six places. Normally a problem will tell you to report the answer to the nearest tenth, or hundreth or whatever. This would define the number significant digits. So if your caculator gives you an answer like 75,000.0387893, but you were asked to report it to the nearest 10th, then the last significant place is .0, the remaining numbers are insignificant, because you were not asked to report to that degree of accuracy.

great answer thx bro

- JayLv 64 weeks ago
You can literally figure it out by yourself. If you don't know how to then you need to learn it on your own or get out of whatever class is requiring this work

So there was no need to ask this question or comment either. Got it. I'll just report and move on. Block, if I have to.

No, that's incorrect. If there's a decimal point, all zeroes before and after the decimal will count. Therefore, 75000.0 is 6 sig figs, 75000.03 is 7. Please check this link: http://chemistry.bd.psu.edu/jircitano/sigfigs.html