Four bacterial cells, each 1.5 × 10-6 m long, are arranged in a straight line. There is a gap of 2.0×102 nm2.0\times10^{2}\,\mathrm{nm}2.0×102nm between each adjacent pair.
What is the total length of the line, including the gaps, in metres?
6.8×10−6 m6.8\times10^{-6}\,\mathrm{m}6.8×10−6m
6.2×10−6 m6.2\times10^{-6}\,\mathrm{m}6.2×10−6m
8.0×10−6 m8.0\times10^{-6}\,\mathrm{m}8.0×10−6m
6.6×10−6 m6.6\times10^{-6}\,\mathrm{m}6.6×10−6m
48 exam-style questions on Edexcel GCSE Biology 1.2 Number, size and scale, covering 1.2.1 Number, size and scale with estimations and 1.2.2 Quantitative units in relation to cells. Each one has a worked solution and a mark scheme showing where the marks go.