1 significant figure.
The rule when rounding off numbers is "If the first figure to be discarded is 5 or more then the previous figure is increased by 1". As the answer only requires 2 significant figure then the first figure to be discarded is the units digit of 1. As this is not 5 or more then the previous figure (5) remains unchanged. 151.208 to 2 sf = 150 NOTE : Zeros are kept to show the position of the decimal point or to indicate that zero is a significant figure.
to 1 significant digit: 8000 2 significant digits: 7700 3 significant digits: 7660 4 significant digits: 7656. 5 significant digits: 7656.0 6 significant digits: 7656.00 and so on and so forth for forever..........
The number of significant digits in an integer ending in zeros is always ambiguous. It is not clear whether the number is accurate to the nearest hundred thousands (1 significant digit), ir to the nearest unit (6 sig digs).
2
It is 0.01
7000
0.9
0.1
9000
10000000
800
200
100
round to the first significant figure
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.
It is 0 0.00005