Question

Write down the number of significant figures in the following:

(i)0.0017 (ii)6300​

Answer 1

Explanation:

Positive exponents

36,600

a number greater than 1

exponent of 10 is a positive whole number

value of the exponent

number of places the decimal point must be moved so that the notation is in standard form

36,600 x 100

For each place the decimal point is moved to the left, add 1 to the original exponent

3.66 x 104

Negative exponents

0.00563

a number less than 1

exponent of 10 is a positive whole number

value of the exponent

number of places the decimal point must be moved so that the notation is in standard form

0.00563 x 100

For each place the decimal point is moved to the right, subtract 1 from the original exponent

5.63 x 10-3