It is 640.
8468 rounded to 2 significant figures is 8500
72.8 round to two is 73.
2.6
22.1 to two significant figures = 22
0.00067 rounded to two significant figures = 0.00067
0.036 The significant figures are indicated by the square brackets 0.0[35550], so we round this part of the figure.
72 is 72.2 rounded to two significant figures.
8468 rounded to 2 significant figures is 8500
0.004560 to two significant figures results in: 0.0046
3800000
1.0
Just cut off the numbers at the eight: 48,000,000
76.51 rounded to 1 significant figures would be 77
72.8 round to two is 73.
To round 644 to two significant figures, you look at the first two digits, which are 6 and 4. The next digit is 4, which is less than 5, so you do not round up. Therefore, 644 rounded to two significant figures is 640.
93
2.6