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?

2. Para pintar un objeto de un solo color, dis- ponemos de 3 colores diferentes de pinturas brillantes y otros 4 colores de pinturas opa- cas. ¿De cuántas maneras podemos elegir la pintura con la que pintaremos el objeto?

\( \frac{1}{3} \) part of total students in a classroom boys. If there are 32 girls in the classrom how many students are there in the cla room?

Using the following conversions between the metric and U.S. systems, convert the measurement. Round your answer to 3 decimal places as needed There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart, and 4 quarts in a gallon. \( 1 \mathrm{~L}=0.26 \) gallons \( 26.04 \mathrm{~mL}= \)

7 km a dm \( \begin{array}{lllll}\text { a) } 70 & \text { b) } 70000 & \text { c) } 0,7 & \text { d) } 0,07 & \text { e) } 7000\end{array} \)

Score: \( 29.3 / 111 \) Answered: 18/75 Using the following conversions between the metric and U.S. systems, convert the measurement. Round your answer to 3 decimal places as needed There are 8 ounces in a cup, 2 cups in a pint, 2 pints in a quart, and 4 quarts in a gallon. \( 1 \mathrm{~L}=0.26 \) gallons \( 26.04 \mathrm{~mL}=\square \)