20.865
Because otherwise you are using figures which imply an accuracy that cannot be justified.
Only one. The zeros are there to put the 5 into its proper position; they are not significant digits.
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.
Basic sign is 'x' or 'X'. The proper sign for calculating is '*'. boswell1
20.865
2 we have a answer ..
Because otherwise you are using figures which imply an accuracy that cannot be justified.
Only one. The zeros are there to put the 5 into its proper position; they are not significant digits.
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.