Posted by Yulia on Tuesday, August 25, 2009 at 12:04am.
You have far too many numbers after the decimal point but the first one is right. The second one is right. And you are correct about the fourth one; i.e., it doesn't look right and isn't.
V = 4/3(pi)r^3 = 106
I get something like 3 but that isn't exact.
I re-read the problem and you are asking about sig fig.
For the first one, if 2 cm is the correct number (not 2.0 or 2.00), then you have only one sig fig so 33.51 would be rounded to 30.
For the second one, you are allowed 2; therefore, round to 15
For the third one, you are allowed 3 figures.
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