89.7
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Rounded to two significant figures, 0.00079511 is approximately equal to 0.000080.
Rounded to two significant figures, 0.8783 is equal to 0.88.
Rounded to three significant figures, the fourth root of 0.04 is equal to 0.447.
0.0111
When rounding 5.05 to two significant figures, we first identify the two most significant digits, which are the 5 and the 0. The digit following the last significant digit is 5, which is equal to or greater than 5, so we round the last significant digit up by 1. Therefore, 5.05 rounded to two significant figures is 5.1.