Study the pie charts above and answer the questions that follow - NSC Mathematical Literacy - Question 5 - 2019 - Paper 1

To calculate the percentage allocated for yard trimmings, we use the formula:
Percentage for Yard Trimmings = ( \frac{\text{Yard Trimmings}}{\text{Total Material}} \times 100 )
= ( \frac{3.4}{91.16} \times 100 \approx 3.73% )

To determine the percentage allocated for textiles, we can directly derive it from the pie chart, noting that textiles make up 2.7% of the total material.

The total amount of plastic recycled in 2015 can be calculated by first finding the percentage of plastic recycled and then applying it to the total material:
Total Plastic = ( 91.16 \times \frac{3.4}{100} )
= ( 3.0964 , \text{million tons} )

An example of a product that could be recycled under the metals category is aluminum cans. These include beverage cans or food containers that are commonly recycled.

A bar graph would be another effective type of graph to represent the data. It allows for easy comparisons between the different categories of recycled materials.

To determine this probability, we first calculate the total percentage for the 'other' category. Assuming 'other' is 11.2%, the probability can be calculated as follows:
Probability = ( \frac{\text{Percentage of Other Materials}}{\text{Total Non-textile Materials}} )
= ( \frac{11.2}{100 - 2.7} = 0.120 \text{ (rounded to 3 decimal places)} )