4. A clocktower casts a shadow that is 7 meters in length. A nearby measuring device casts a shadow that is 0.6 meters long. If the stick is 1.2 meters tall, how tall is the clocktower?

h) \( \int \frac{3+6 x+4 x^{2}-2 x^{3}}{x^{2}\left(x^{2}+3\right)} d x \)

Aufgabe 5: Faktorisieren Zerlegen Sie die Summen in Faktoren. \( \begin{array}{ll}\text { a) } 36 x^{2}-49 y^{2} & \text { Tipp: Binomische Formeln } \\ \text { b) } x^{2}-10 x+16 & \text { Tipp: Zweiklammeransatz } \\ \text { c) } p^{4}-6 p^{2} q^{2}+9 q^{4} & \text { Das kriegen Sie ab hier auch } \\ \text { d) } p^{2}+5 p-36 & \end{array} \)

Mrs Brown gave \( \frac{4}{7} \) of her money to her son. He spent \( \frac{2}{5} \) of the money on a pair of shoes and the rest on two books that cost \( \$ 18 \) each. How much did Mrs Brown have at first?

Simple interest on ₹ 500 for 4 yr at the rate of \( 8 \% \) per annum is \( \begin{array}{ll}\text { (A) } ₹ 10 & \text { (B) } ₹ 32 \\ \text { (C) } ₹ 40 & \text { (D) } ₹ 160\end{array} \)

\( \begin{array}{ll}(3-x, 5)=(4, y+2) & 6268 x= \\ \text { (A) } 0 & \text { (B) }-1\end{array} \)