2.2 \( \begin{array}{l}\text { Miss Naidoo uses a square baking pan with dimensions of } 8 \text { inches by } 8 \text { inches. She } \\ \text { cuts the brownies in the baking pan into } 16 \text { equal sized blocks. } \\ \text { NOTE }: \mathbf{1} \text { inch }=2,54 \mathrm{~cm} \\ \text { You may use the formula: Area of a square }=\text { side } \times \text { side }\end{array} \) Use the information above to answer the questions that follow. 2.2 .1 Calculate the area of the baking pan incm \( { }^{2} \). 2.2 .2 Only \( 80 \% \) of the brownies were sold. Write down the number that was left. 2.2 .3 Write the ratio number of brownies sold to number of brownies left in a simplified form.
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The area of the baking pan in square centimeters can be calculated by first converting the dimensions from inches to centimeters. The baking pan is 8 inches by 8 inches, which equals 20.32 cm by 20.32 cm (since 1 inch = 2.54 cm). Thus, the area is \(20.32 \, \text{cm} \times 20.32 \, \text{cm} \approx 412.16 \, \text{cm}^2\). If Miss Naidoo cuts 16 brownies and sells 80% of them, that means she sold \(0.8 \times 16 = 12.8\) brownies. Since you can’t sell a fraction of a brownie, we round it, resulting in 13 brownies sold. Therefore, the number left is \(16 - 13 = 3\) brownies. The ratio of brownies sold to those left is \(13:3\). This ratio is already in a simplified form, showing how many brownies were sold compared to how many remain!
