3.2.3 The compost that Sam uses states that one bag can cover \( 11,8 \mathrm{~m}^{2} \). Sam calculated that he would need 12 bags. Determine if his calculation is correct.

Sinhle's mom gave him \( R_{20} \) to go to the shop. He buys a coke for \( R_{10,} \) a lollipop for \( R_{2} \) and a packet of chips for \( R_{5} \). What is his change? Show your calculations below.

10 - Para se obterem 28 kg de farinha, săo necessários 40 kg de trigo. trigo são necessários para se obterem 7 kg de farinha?

3. O preço da gasolina nas refinarias é de \( R \$ 2,08 / \) litro, o que significa um reajuste de \( +4,0 \% \) em relaçäo aos valores anteriores. Na bomba, essa gasolina, após a inserção de todos os impostos e lucro do posto, passa a custar \( R \$ 5,72 / \) litro. a. Qual era o preço da gasolina nas refinarias antes do aumento?

Sinhle's mom gave him \( R_{20} \) to go to the shop. He buys a coke for R Rot a lollipop for \( R_{2} \) and a packet of chips for \( R_{55} \). What is his change? Show your calculations below.

Rafael wants to buy the same number of gift bags and bows. Gift bags are sold in packs of 6 . Bows are sold in packs of 9 . What is the least number of gift bags and bows that Rafael can buy?