8. \( \frac{5}{8} \) of the 64 musicians in a music contest are guitarists. Some of the guitarists play jazz solos, and the rest play classical solos. The ratio of the number of guitarists playing jazz solos to the total number of guitarists in the contest is \( 1: 4 \). How many guitarists play classical solos in the contest? \( \begin{array}{ll}\text { (A) } 10 & \text { (C) } 30 \\ \text { (B) } 20 & \text { (D) } 40\end{array} \)

q) \( 2^{2-x}-2^{x}=-3 \)

Solve for \( v \). \[ 2 v^{2}+82 v=0 \] Write each solution as an integer, proper fraction, or improper fraction in simplest form. If there are multiple solutions, separate them with commas. \( \quad v= \)

Solve the following inequality algebraically. \[ x^{3}+3 x^{2}<0 \] The solution is \( \square \). (Type your answer in interval notation. Simplify your answer. Use integers or fractions fo

A genetic experiment with peas resulted in one sample of offspring that consisted of 439 green peas and 151 yellow peas. a. Construct a \( 90 \% \) confidence interval to estimate of the percentage of yellow peas. b. Based on the confidence interval, do the results of the experiment appear to contradict the expectation that \( 25 \% \) of the offspring peas would be yellow? a. Construct a \( 90 \% \) confidence interval. Express the percentages in decimal form. \( .227

IV. Prueba con pendientes que los puntos \( A(2,5), B(0,1) \) y \( C(-2,-3) \) son colineales. Dibuja la gráfica.