Give details on the challenges the family faced in their escape by boat.

Find the exact value of each expression. \( \begin{array}{ll}\text { (1) } \arcsin \left(\frac{\sqrt{3}}{2}\right)=\frac{\pi}{3} & \text { because } \sin \frac{\pi}{3}=\frac{\sqrt{3}}{2}, \frac{\pi}{3} \in\left[-\frac{\pi}{2}, \frac{\pi}{2}\right] \\ \text { (2) } \arccos (-1)=\pi & \text { because } \cos \pi=-1, \pi \in[0, \pi] \\ \text { (3) } \tan (\arctan 10)=10\end{array} \)

Find the slope of the line passing through the points \( (7,-3) \) and \( (1,-5) \)

5. The function \( f(x)=x^{3}+b x-30 \) has the following roots: 5,3 and \( n \). what is the value of \( n \) ? A) -4 B) -2 C) 2 D) 4

Write the equation of the line that passes through the points \( (8,4) \) and \( (-9,6) \) Put your answer in fully simplified point-slope form, unless it is a vertical or horizontal line.

ккорость лодки в стоячей воде равна 21 \( \frac{\text { км }}{\text { ч }} \) Валерий по течению проплыл 12 км I тотратил на это столько времени, сколько тлыл против течения 9 км. Вычисли скорость течения реки.