For doing significant figure you down count from the start the required amount, so 645533 would become 646000.
645533 to three significant figures is 646000.
There are three significant figures in the number 102.
62 rounded to one significant figure is 60. 57 rounded to one significant figure is 60. 573 rounded to one significant figure is 600. 0.0573 rounded to one significant figure is 0.06. In each of these answers the 6 is the only significant figure.
25.488000000000003
It already is rounded to three significant figures.
9, every number counts as a significant figure except leading zeroes and any zero without a different digit after it is not a significant figure unless there is a decimal point after it. i.e. 0500 has 1 significant digit, 501 has 3, and 500. has 3
8.87
It's already there.
There are three.
There are three of them there.
0.00860 has three significant figures.
There are three significant figures in the number 102.
62 rounded to one significant figure is 60. 57 rounded to one significant figure is 60. 573 rounded to one significant figure is 600. 0.0573 rounded to one significant figure is 0.06. In each of these answers the 6 is the only significant figure.
To round to three significant figure you need to retain only the first three digits, starting with a non-zero digit. So it is 58x. Now the x bit is 2.968 and since 0.968 is greater than 0.5, 2.968 is rounded up to 3. So the answer is 583.
635 is already a three significant figure number.
0.0034088 in three significant figures would be 0.00341
9010
Three.