Discuss the skills required to undertake jobs

4 In \( \triangle \mathrm{ABC} \), if \( \mathrm{m}(\angle \mathrm{A})=85^{\circ}, \sin \mathrm{B}=\cos \mathrm{B} \), then \( \mathrm{m}(\angle \mathrm{C})=\ldots \ldots \ldots \ldots \) \( \begin{array}{llll}\text { (a) } 30^{\circ} & \text { (b) } 45^{\circ} & \text { (c) } 50^{\circ} & \text { (E1-Beheira } 17) \\ 60^{\circ}\end{array} \)

In a certain suburb there are no postal deliveries to street addresses. Each household has a postbox at the local post office. A company wants to send out a questionnaire to a sample of the householders to find out if there is a demand for garden services in the area. A post box number is chosen at random out of the first 10 numbers and then every 20 th number is chosen and the questionnaires placed in these post boxes. This sampling technique is called Select one: a. stratified random sampling. c. availability sampling. d. simple random sampling.

The pdf of a \( r, v x \) is given by \( f(x)=\left[\begin{array}{l}\frac{2}{3} x-1

(1.) \( \frac{9}{8} \times \frac{10}{21} \times \frac{14}{25} \) มีค่าเท่ากับเท่าใด

114 Da un punto \( A \) esterno a una circonferenza, en- Fabio ha tracciato due rette tangenti alla cir- conferenza nei punti \( B \) e \( C \) e i raggi \( O B \) e OC. Si è così formato un angolo \( B \widehat{O C} \) di \( 115^{\circ} \).