3.6 Increase 99 in the ratio \( 12: 11 \) \( \qquad \) \( \qquad \) (2 [1 QUESTION 4 4.1 The price of an item in United states of America was US\$230 on a particular day. The exchange rate on this day was US\$1 : R17,80. Calculate the cost of this item in Rand value. \( \qquad \) \( \qquad \) \( \qquad \) (2 4.2 Determine \( 15 \% \) of 300 kg . \( \qquad \) \( \qquad \) (1 4.3 The cost of a loaf of bread in a shop was R11,50. This price was increased by \( 6 \% \). Calculate the new price of the same loaf of bread in this shop. \( \qquad \) \( \qquad \) (2 4.4 A shop sells cool drinks at R24 each, including \( 14 \% \) VAT. What is the price of a cool drink, excluding VAT?
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To increase 99 in the ratio \(12:11\), you first add the parts of the ratio (12 + 11 = 23) and then calculate each part's contribution to the original number. The increase here corresponds to \( (12/23) \times 99 \), leading to a fun realization that you're not just changing a number, but playing with proportions! When it comes to exchanging currencies, if you want to find the cost of that item in Rand, simply multiply the price in USD (US$230) by the exchange rate (R17.80). That’s putting your math skills to work, turning dollars into rands quicker than you can say "international shopping spree!"