Answer:To express 0.05061 to three significant figures, we need to round the number to three digits. In this case, the first non-zero digit is "5," and we need to consider the digit immediately to the right, which is "0." Since the digit "0" is less than 5, we do not round up. Therefore, the third digit remains the same. Hence, 0.05061, rounded to three significant figures, is 0.051.
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