The growth of daisy plants on a lawn is affected by biotic factors and by abiotic factors. The figure below shows a plan of a garden. A student estimates the number of daisy plants growing on the lawn. The student places a quadrat at 10 different positions on the lawn. The quadrat measures 50 cm × 50 cm. The student counts the number of daisy plants in each quadrat. The mean number of daisy plants in each quadrat is 6. Calculate the number of daisy plants on the lawn. Give your answer to 3 significant figures. Number of daisy plants on the lawn – 7081

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1. Mean number per m² = 24 (or 6 × 4)
   Area of the lawn = (½ × 16 × 10) – (6 × 3) = 80 – 18 = 62 m²
   Total number of daisies = mean × area = 24 × 62 = 1488
   Rounded to 3 significant figures = 1490
   So, the total number of daisies is approximately 1490.

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