Q2. Dilute nitric acid reacts with an unknown solid \( X \) to produce a gas \( Y \). A student wanted to investigate the rate of the reaction between dilute nitric acid and solid \( X \). The steps below outline her experiment: 1. Measure 10.0 g of solid \( X \). 2. Measure \( 28.40 \mathrm{~cm}^{3} \) of dilute nitric acid. 3. Add solid \( X \) to the nitric acid in a conical flask and start timing. 4. Seal the conical flask and measure the volume of gas \( Y \) produced after one minute. (a) Name three pieces of apparatus which the student should use to measure the quantities in her experiment. [2] State the observation that would be made when solid \( X \) was added to dilute nitric Static

2. (1.5 puntos) Construye el sistema \( x=A x+d \) donde x es el vector de producción A es la matriz insumo - producto

A 4 metal strip is being installed around a workbench that is 10 feet long and 2 feet wide. If the stripping costs \( \$ 5 \) per foot, find the total cost of the stripping.

\( \begin{array}{lll}\text { a. }-1,-8 & \text { b. } 7,8 & \text { c. }-7,8 \\ \text { Find the value of the roots for the quadratic equation } x^{2}+11 x+24 \\ \begin{array}{lll}\text { a. } 8,-3 & \text { b. }-8,3 & \text { c. } 8,3\end{array}\end{array} \)

Let \( g(x) \) be the reflection of \( f(x)=2 x+9 \) in the \( x \)-axis. What is a function rule for \( g(x) \) ? \( \begin{array}{l}g(x)=-2 x+9 \\ \text { o } g(x)=-2 x-9 \\ g(x)=2 x+9 \\ g(x)=2 x-9\end{array} \)

5. Calcular el valor numérico de: \( E=\left(a^{2}+b^{2}\right)^{3}+\left(a^{2}-b^{2}\right)^{3}-6 b^{4}\left(a^{2}-b^{2}\right) \) Para: \( a^{3}=2 ; b^{3}=3 \) \( \begin{array}{lll}\text { A) } 62 & \text { B) } 63 & \text { C) } 64 \\ \text { D) } 65 & \text { E) } 66 & \end{array} \)