2. A calculator manufacturer offers two different models for students. The company has sold 10,000 scientific calculators so far \( \& \) continues to sell 1500 per month. It has also sold 18,000 graphical models and continues to sell 1300 of this model each month. When will the sales of scientific calculators equal the sales of graphical calculator

Fill in the missing numbers: \[ \begin{array}{rr}4.4 \\ 9.24 \\ 4.4\end{array} \]

\( \int _ { 1 } ^ { 2 } \frac { 1 } { ( x + 1 ) ^ { 2 } } d x \quad n = 4 \)

La función \( f \) se define asi: \( f(x)=\cos ^{2} x-3 \operatorname{sen}^{2} x, 0 \leq x \leq \pi \). (a) Halle las raices de la ecuación \( f(x)=0 \). (b) (i) Halle \( f^{\prime}(x) \). (ii) A partir de lo anterior, halle las coordenadas de los puntos del grático de \( y=f(x) \) en los que \( f^{\prime}(x)=0 \).

\( 3500 cm ^ { 2 } = \)

2.1 Solve for \( x \) in the following: 2.1.1 \( x^{2}=16 \) \( 2.1 .2 \quad 4 x^{2}=x+1 \) \( 2.1 .3 \quad \frac{-3}{(x-2)(x+4)} \leq 0 \) 2.2 Solve for \( x \) and \( y \) simultaneously: \( x y={ }^{\circ} x-y \) and \( y=x+4 \) 2.3 . If \( x=\frac{2 \pm \sqrt{5-3 p}}{4} \), for which values of \( p \) will \( x \) be imaginary (non-real)?