1a. The following diagram shows triangle ABC, with AB = 10 and AC = 12. diagram not to scale B 10 12 Given that cos  = find the value of sin Â. 1b. Find the area of triangle ABC. 2a. A metal sphere has a radius 14 cm. Find the volume of the sphere expressing your answer in the form a × 10*, 1 sa< 10 and kE Z. 2b. The sphere is to be melted down and remoulded into the shape of a cone with a height of 14.8 cm. Find the radius of the base of the cone, correct to 2 significant figures. За.. A ladder on a fire truck has its base at point B which is 4 metres above the ground. The ladder is extended and its other end rests on a vertical wall at point C, 16 metres above the ground. The horizontal distance between B and C is 12 metres.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.