The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The proper number of significant figures for 7800 L depends on how the number is presented. If it is written as 7800 with no decimal point, it typically has three significant figures. However, if it were written as 7800. or in scientific notation (e.g., 7.8 × 10³), it would have four significant figures. To determine the exact number of significant figures, additional context or notation is required.
20.865
Because otherwise you are using figures which imply an accuracy that cannot be justified.
In the number 0.05, there are two significant figures. The zero before the decimal point is not considered significant as it is a leading zero. The significant figures in a number are the digits that carry meaning contributing to its precision.
A ruler or scale should not be read to less than the smallest graduation. In practice, in-between measurements can be estimated but they are not significant.
20.865
2 we have a answer ..
Because otherwise you are using figures which imply an accuracy that cannot be justified.
In the number 0.05, there are two significant figures. The zero before the decimal point is not considered significant as it is a leading zero. The significant figures in a number are the digits that carry meaning contributing to its precision.
A ruler or scale should not be read to less than the smallest graduation. In practice, in-between measurements can be estimated but they are not significant.
It isn't clear what the question is. If you are supposed to multiply or divide, and if by "signification figures" you mean significant digits, do the multiplication (or division), then round to three significant digits - since the least-precise of the numbers only has three significant digits.
6.437376 Or with proper observance of significant figures: 6 km
Expressed as a proper fraction in its simplest form, 3-7 = 1/2187 Expressed as a decimal, rounded to three significant figures, this is equal to 0.000457.
0.0943
proper nutrition, proper amount of sleep, proper amount of exercize
1.8 because 0.7 only has 2 signifant figures
A proper fraction is less than 1. Any positive number multiplied by a positive number less 1 will be less than itself. In multiplying two proper fractions, each one is being multiplied by a number less than 1.