Preparation fime: 15 min Baking time: 20 min 2.1 Use the ingredients for frosting and write the ratio of cups of icing sugar to teasp of vanilla essence, in its simplest form. 2.2 If she starts preparing at \( 10: 42 \), determine the time at which the cupcakes will b finished baking. 2.3 Determine the amount of milk needed in ml. ( 1 cup \( =250 \) ml) If 1 millilitre of sugar weighs \( 1,59 \mathrm{~g} \), determine how many kilograms of suga needed. Give the answer correct to 3 decimal places.

Given: Preparation time: 15 minutes Baking time: 20 minutes 2.1 To find the ratio of cups of icing sugar to teaspoons of vanilla essence, we need the quantities of icing sugar and vanilla essence used in the frosting. Let's assume the quantity of icing sugar used is \( x \) cups and the quantity of vanilla essence used is \( y \) teaspoons. The ratio of icing sugar to vanilla essence is \( \frac{x}{y} \). 2.2 To determine the time at which the cupcakes will be finished baking, we need to add the preparation time and the baking time to the starting time. Starting time: 10:42 Preparation time: 15 minutes Baking time: 20 minutes Total time = 15 minutes + 20 minutes = 35 minutes Adding 35 minutes to 10:42, we get: 10:42 + 35 minutes = 11:17 Therefore, the cupcakes will be finished baking at 11:17. 2.3 To determine the amount of milk needed in ml, we need to convert the quantity of milk from cups to milliliters. 1 cup = 250 ml Let's assume the quantity of milk needed is \( z \) cups. The amount of milk needed in ml is \( 250z \) ml. To determine the amount of sugar needed in kilograms, we need to convert the quantity of sugar from grams to kilograms. 1 milliliter of sugar weighs 1.59 g. Let's assume the quantity of sugar needed is \( w \) grams. The amount of sugar needed in kilograms is \( \frac{w}{1000} \) kg. Now, we can calculate the amount of milk needed in ml and the amount of sugar needed in kilograms.