IP Standing side by side, you and a friend step off a bridge at different times and fall for 1.6 s to the water below. Your friend goes first, and you follow after she has dropped a distance of 2.2 m .

If \( y=\cot \left(\frac{\pi}{6} z\right) \perp z=3 \sqrt{x} \), then \( \frac{d y}{d x}=\ldots \ldots \). at \( x=1 \) \( \begin{array}{llll}\text { a) }-\frac{\pi}{3} & \text { b) } \frac{\pi}{36} & \text { c) }-\frac{\pi}{6} & \text { d) }-\frac{\pi}{4}\end{array} \)

6. The shadow of an object varies directly os. its height. A man 1.8 meters tall casts a shadaw of 4.32 m long. If at the same time a flagpole casts a shadow 12.8 m long, how high is the flagpole 7. Jenny earn 450 pesos in selling apples in 4 Sundoys. How many sunday will it talke her to earn I, 350 pesos ? s. Everyday, your run 5 kilomeiters in 40 ninutes your frimed friend run 8 lulometers everyday at the same pace as you, How. ong is your friends run?

5) Вычислите объем сердца взрослого человека, если его длина \( h=15 \mathrm{~cm} \), а поперечный разрез \( d=10 \mathrm{~cm} \) \( \left(V=\frac{1}{12} \pi d^{2} h\right) \).

Sano : \( P_{1}=8 \mathrm{H} \) \( P_{2}=1 \mathrm{H} \) \( P_{3}=3 \mathrm{H} \) \( d_{1}=180^{\circ} \) \( d_{2}=125^{\circ} \) \( \alpha_{3}=45^{\circ} \)

a. \( \left(4 \times 10^{8}\right) \cdot\left(7 \times 10^{3}\right) \)