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A scientist measured the size of each gill lamella of the gills of 40 damselfly larvae.His results are shown in Table 5.Table 5Mean width / mm(± uncertainty / mm)1.61(± 0.19)Mean length / mm(± uncertainty / mm)6.12(± 0.41)Calculate the mean surface area of one side of one gill lamella. Assume that a gilllamella is rectangular and give your answer to an appropriate number ofsignificant figures.Include the percentage error (uncertainty) of surface area in your answer.Show your working
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