79958.42
rounded to 3 shouldnt it be like 8.00 or 80.0?
79958.42
Remember that with significant figures, 0 counts in the context of a 10 or 100 and so forth, so for example, in 405, the 0 is significant, whereas in 0423, the 0 is not significant.
Therefore, when rounding this to three significant figures, the answer is 80000, as e^(i*pi) said.