0.00241
0.990
It's already there.
6.71 is 6.7050 is rounded to three significant figures.
When multiplying, the number of significant numbers in the answer should be the same as the fewest significant figures in the problem. Both 13.5 and 3.00 have three significant figures, so the answer will have three significant figures. 13.5 x 3.00 = 40.5 exactly (no need to round).
0.07537 rounds to 0.0754
0.0034088 in three significant figures would be 0.00341
130
31,500
201
It is: 1040
21.3
0.990
The number 10.989 rounded to 3 significant figures is 11.0
79,900
It's already there.
6.71 is 6.7050 is rounded to three significant figures.
2.540x10^4