1.4 * 10^10 or alternatively 1.4e10.
To write a number to two significant figures, identify the first two non-zero digits from the left. If there are more digits following these two, round the second digit based on the value of the next digit. For example, for the number 0.00456, the first two significant figures are 4 and 5, so it would be written as 0.0046 when rounded to two significant figures.
42 has two significant figures.
You add either 9 or 12 zeroes to the "100". There are two definitions for "billion", but in English-speaking countries, adding 9 zeroes is common.
23.43 rounded to two significant figures is 23.
687 to two significant figures is 690.
132.7495 in two significant figures is 130.
0.081778 to two significant figures is 0.082
2,000,300,000
0.089
6,592,000,000
9,000,852,000
9,063,002,000
To write a number to two significant figures, identify the first two non-zero digits from the left. If there are more digits following these two, round the second digit based on the value of the next digit. For example, for the number 0.00456, the first two significant figures are 4 and 5, so it would be written as 0.0046 when rounded to two significant figures.
2,500,003,005
7.428571429 significant figures as needed
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
Expressed in figures, this is equal to 2,019,700,604,012.