Answers

Problem 1: 12,000 cm has two significant digits.

Problem 2: .0011 cm has two significant digits.

Problem 3: 12.000130 cm has eight significant digits.

Problem 4: The product of 120 cm and .5 cm should have 1 significant digit.

Problem 5: The product of 52 cm and 121.5 cm is 6300 cm² when written with the correct number of significant digits.
 
 
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