smc-6728-60-Significant Figures

L&E, 2ADV EQ-Bank 12

Evaluate \(e^3\), giving your answer to 3 significant figures. (1 mark)

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\(e^3=20.1 \ \text{(3 sig fig)}\)

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\(e^3=20.085 \ldots=20.1 \ \text{(3 sig fig)}\)

Evaluate \(5^{\tfrac{1}{3}}\), giving your answer to 3 significant figures. (1 mark)

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\(5^{\tfrac{1}{3}}=1.71 \ \text{(3 sig fig)}\)

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\(\text{By calculator:}\)

\(5^{\tfrac{1}{3}}=1.709 \ldots=1.71 \ \text{(3 sig fig)}\)

Evaluate `e^(−0.5)` correct to three decimal places. (2 marks)

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`0.607\ \ text{(to 3 d.p.)}`

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`e^(−0.5)`	`= 0.6065…`
	`= 0.607\ \ text{(to 3 d.p.)}`