It is 4000.
4252 to 1 significant figure is 4000.
40000
31.5
The Bold and the Beautiful - 1987 1-4252 was released on: USA: 8 March 2004
I think your question is asking how you would round 17.521 to the nearest number with 1 significant figure...if that's the case, it would round to 10.
e A number that has only 1 significant figure can't be rounded to 3 significant figures
Well, in science you always need significant digits: 0 has no significant digits, so we round to the nearest number with 1 significant digit: namely, -1 or 1.
The first significant number is 6 but since the next number is over 5, we round the 6 up so it becomes 7000
Round 12 to 1 significant figure is 10.
Pick the closest whole number to 8.6 that is not a fraction. In this case it is 9.
0.000892 to 1 significant figure is 0.0009 (1st significant figure is the first non-digit from the left, where in this case you can omit the number 2 since it will make no difference to the answer)
0.06 beginning zeros are not significant