Brainstorm some ideas of where you may need to find the arc length or sector area in the real world and share your idea. you only need to share one idea of where you may find either a sector area or arc length in every day life.

Answers:

 An example of an arc length could be running around a circular track. An arc is the distance along the outside of a circle. When people run around a circular track, they are running around an arc. You could calculate the distance of the arc to see how far someone ran.

An example of a sector area could be the area covered by a lawn sprinkler rotating around a fixed point. A sprinkler that moves around in a circle is spraying water in the shape of a sector of a circle.

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.