If the diameter of a circle is 5 centimeters, how long is the arc subtended by an angle measuring 60° ?

circumference = 5 * PI = 15.7079632679
arc length   =   circumference • [central angle (degrees) ÷ 360]
arc length   =   15.7079632679 * 60 /360
arc length   =   2.617993878

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.