Graded Quiz 3: Approximation & Estimation - Answers

Q1: (a) 1.154 (to 3 decimal places)
Q1: (b) 1.15 (to 3 significant figures)

Q2: (a) 0.6 (with a dot on top of the digit 6) [since exact answer is required, we express it as a recurring decimal]
Q2: (b) 0.667 (to 3 significant figures) [since the degree of accuracy is not stated in the question, then we'll follow the general instructions]
Q2: (c) $0.67 [since money is expressed up to 2 decimal places]

Q3: It is estimated to be square root of (16 x 81) / 4
which gives 18

Q4: (a) 4/3 (as an improper fraction) or 1 1/3 (as a mixed number)
Q4: (b) 1.33 (to 3 significant figures) [since the degree of accuracy is not stated in the question, then we'll follow the general instructions]

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