12. Suppose you are an avid reader and are looking to save money on the cost of books. Instead of paying about \( \$ 20 \) for each book, you decide to look into purchasing a Kindle for \( \$ 120 \). You can purchase e-books for about \( \$ 5 \) each. a. Find the slope-intercept equation for the cost of the hard copy of books using \( x \) to represent the number of books. \[ y=m x+b \] \[ y=20 x+0 \quad y=20 x \] b. Find the slope-intercept equation for the cost of the Kindle with cost of e-books using \( x \) to represent the number of books.

30 points A box contains twelve 16GB flash drives and eighteen 32 GB flash drives. Two 16 GB flash drives are defective, and four 32 GB flash drives are defective. If a flash drive is picked at random, what is the probability that it is a 16GB flash drive OR defective? \( \frac{2}{15} \) \( \frac{8}{15} \) \( \frac{13}{30} \) \( \frac{3}{5} \) Clear my selection

\( 1 \leftarrow \quad \begin{array}{c}\text { Differentiate. } \\ y=10^{x} \\ \end{array} \)

El precio de un pro ventas A. aumenta en 5 B. disminuye en

Figura 2. Sistema Resorte-Masa -Amortiguadory su velocidad con respecto al tiempo. Para su siguiente gran lanzamiento, una compañía de coches espera ganancias dada por la función \( g(t)=5 t e^{-\frac{4}{5} t+4}+10 \), como se muestra en la Figura 3. Calcule la ganancias totales un año después de su lanzamiento.

¿Cuántos Dtros de agua entran en un tanque cilindrico de 12 ples de radio y 3,5 yardas de altura? dillindro-pi* \( r^{2-} h \) )