How many significant figures are in the number 54100?

Answer 1

Three. All non-zero digits are significant, as are zeroes between them, and zeroes after a decimal point. The entire question about sigfigs is "what digits can you be confident are not rounded off?" The answer is three because you cannot prove that this is not rounded to the nearest hundred. You can only be sure that the three digits (405) are all correct and even the 5 might be rounded off. If it were 40500.0, then all six digits would be SigFigs because that is showing exactness. ■

Answer 2

Two. Think of it like this: if you want to compare the population of different cities, you'd want to have the numbers expressed quite roughly, to two or three significant figures. Everybody realises that these numbers would not be an accurate total of all the people there. Any number of people below 544444 would give 540000 when given to two sig figs. More than that would become 550000. If you require more accuracy from your numbers eg if you had to ensure a liferaft space for every person on board a ship, then you need to use more significant figures in your numbers.

Answer 3

there are 6 significant figures in 530405000.

5,3,0,4,0, & 5 are the significant figures.

Answer 4

Five significants in 40500, three in 40.5*103

Answer 5

There are 3 significant figures in this number.

Answer 6

1 of them.

Answer 7

3 of them.

Answer 8

3 of them.

Answer 9

3 of them.

Answer 10

One