Exercise Given intervals of increase/decrease and concavity of a function \( f(x) \) as below, sketch the graph.

2) \( \left(\frac{1}{4}+\frac{1}{2}\right)+\sqrt{\frac{36}{25}} \)

Th. जin. \( x^{2}=9+2 \sqrt{20} \)

Layla is a salesperson who sells computers at an electronics store. She is paid a \( 1.5 \% \) commission for every computer sale she makes, and also makes a base pay each day regardless of sales. One day, Layla sold \( \$ 2000 \) worth of computers and was paid a total of \( \$ 80 \) that day. Write an equation for \( P \), in terms of \( x \), representing Layla's total pay on a day on which she sells \( x \) dollars worth of computers.

Question 10 Write an equation in point-slope form for the line that satisfies the given set of conditions. slope of 0, passes through \( (0,-10) \)

1) La circunferencia. Actividad 1: Dada la ecuación general de una circunferencia \( x^{2}+y^{2}=r^{2} \), calcula el radio de las siguientes circunferencias: 1. \( x^{2}+y^{2}=25 \) 2. \( x^{2}+y^{2}=49 \) 3. \( x^{2}+y^{2}=100 \) Actividad 2: Escribe la ecuación de la circunferencia cuyo centro es \( (0,0) \) y cuyo radio es: 1. 7 2. 5 3. 10