The number of significant figures in "20,000" depends on how the number is presented. If written as "20,000" without a decimal point, it typically has two significant figures. However, if it is written as "20,000." with a decimal point, it has five significant figures. To clarify the intended precision, scientific notation can be used, such as "2.0 × 10^4" for two significant figures or "2.0000 × 10^4" for five significant figures.
1 significant figure.
18.4 rounded to one significant figure becomes 20
20
20 grams = 20 000 milligrams
200 million - 200 000 000 20 billion - 20 000 000 000
1 significant figure.
Rounded to one significant figure it becomes 20
18.4 rounded to one significant figure becomes 20
20
20
20 of them
20 grams = 20 000 milligrams
200 million - 200 000 000 20 billion - 20 000 000 000
20 000
23
20 000 * 1.25 = 25 00020 000 * 1.25 = 25 00020 000 * 1.25 = 25 00020 000 * 1.25 = 25 000
40 000 pounds