Measurement, STD2 EQ-Bank 21

The distance between planets is measured in Astronomical Units (AU).

\(1\ \text{AU}\ \approx 1.496\times 10^8\) kilometres.

Given Venus is approximately 0.7 AU from Earth, calculate this distance in kilometres giving your answer in scientific notation, correct to 3 significant figures. (2 marks)

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\(1.03\times 10^8\ \text{(3 sig. fig.)}\)

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\(\text{Distance}\)	\(=0.7\times \left(1.496\times 10^8\right)\)
	\(=102\,830\,000\)
	\(=1.0283\times 10^8\)
	\(=1.03\times 10^8\ \text{(3 sig. fig.)}\)