009999991 rounded to 2 significant digits is 1.0e7
It is then 0.067 when rounded to 2 significant figures
It is 6.7 when rounded to 2 significant figures
It is 1300 rounded to 2 significant figures
1,430 rounded to 2 significant figures is 1,400
0.6942 rounded off to 2 significant figures is 0.69
2711 rounded to 2 significant digits is 2700
2.99 rounded to three significant digits is 2.96 2.99 rounded to two significant digits is 3.0
3.2
There are three rules that are used when rounding to a desired number of significant digits (figures): 1. All digits that are not zero, are significant 2. In a number that does not have a decimal point, all zeros between two non-zero digits are significant digits 3. In a number that has a decimal point, all zeros after the leftmost non-zero digit are significant Examples: 12345 rounded to 3 significant digits: 12300, or 1.23 x 104 12.345 rounded to 3 significant digits: 12.3, or 1.23 x 101 0.012345 rounded to 3 significant digits: 0.0123, or 1.23 x 10-2 0.012045 rounded to 3 significant digits: 0.0120, or 1.20 x 10-2 In the last example the zero after 2 is significant. That is the reason for keeping it in the result when rewriting it in powers of 10 notation.
Solution: Given, number = 0.4559 If a number only has 2 significant digits, the maximum significant digits it can be rounded to is 2 significant digits. The zeros before a non Zero digit are not significant. The since 9>5 it adds 1 to preceding one while rounding off. ⟹0.046. The original number, 0.4559, has 4 significant digits. Rounding this number to 2 significant digits gives us 0.46.
6.36e+2
1,000 to 2 s.f., or 1,000 (2 s.f.) or 1,000.
At least 1 and at most 7. It could be 3,999,999.9 rounded to 7 significant figures; It could be 3,999,999 rounded to 6 significant figures; It could be 4,000,015 rounded to 5 significant figures; It could be 4,000,429 rounded to 4 significant figures; It could be 3,999,999 rounded to 3 significant figures; It could be 4,049,999 rounded to 2 significant figures; It could be 4,492,467 rounded to 1 significant figure.
236+710 = 946. Rounded to 2 significant digits, that is 950, rounded to one sd, it is 900.
5 significant digits.
1,000 L to 2 s.f., or 1,000 (2 s.f.) or 1,000 L.
5 significant digits because the 2 zeros are in between other significant digits.