The maximum force exerted onto a 51.2 k chair at rest is 316 N due to static friction. What is the coefficient of static friction?

16.8. \( { }^{\circ} \) Знайдіть значення тригонометричних функцій аргументу \( \alpha \) якщо: \( \begin{array}{lll}\text { 1) } \cos \alpha=\frac{12}{13} \text { і } 0<\alpha<\frac{\pi}{2} ; & \text { 3) } \operatorname{tg} \alpha=-\frac{1}{3} \text { і } \frac{3 \pi}{2}<\alpha<2 \pi \\ \text { 2) } \sin \alpha=-\frac{\sqrt{3}}{4} \text { і } \pi<\alpha<\frac{3 \pi}{2} ; & \text { 4) } \operatorname{ctg} \alpha=-7 \text { i } \frac{\pi}{2}<\alpha<\pi\end{array} \)

Solve for \( \mathrm{u}_{1} \) \[ \frac{1}{1+2}=-\frac{5}{1-1} \] If there is mere than one solution, separate them with commas, if there is no solution, click on "No solution",

Which of the following statements is true if \( \lim _{x \rightarrow 3} f(x)=5 \) and \( f(3)=4 \) ? \( f(x) \) is continuous at \( x=3 \) \( f(x) \) is discontinuous at \( x=3 \) \( f(x) \) has a linit at infinity The linit does not evist at \( x=3 \)

han and Amelia have a baby daughter, Sonia. John is 23 kg heavier than Amelia, who ur times as heavy as Sonia. Their combined weight is 122 kg . How heavy is each per

What is \( m \angle 4 \) ? \( m \angle 4=\square^{\circ} \)