## Answers

#### Explanation:

In any number figure, the number of digits in the figure that are important in determining its value are called significant.

Zeros are included only if they contribute to the value of the number. Zeros before the first significant digit, if to the left of decimal point are ignored and similarly zeros to the right of number after decimal point are not included.

For example, in the number

Here in

Five significant digits

#### Explanation:

The

The fact that one decimal place is actually specified means that the

So all the digits given are significant, which makes five.

5 significant figures.

#### Explanation:

There are 5 significant figures.

The reason is that

One has to ask where the rounding off happened?

Any number from 2369.5 to 2370.4 would round to 2370.

Tenths have rounded off to units.

However, in the case of

Anything from 2369.95 to 2370.04....would round to 2370.0, given to the nearest tenth, or 1 decimal place.

If this was as a result of measuring rather than calculating, a length of 2370.0 means that the accuracy is to tenths. In the case of 2370, the accuracy is to tens.