Use the formula, s = m/360
· 2πr, to answer the question.

What part of the circle does the expression 2πr represent?

A 2πr represents the radius of the circle.
B 2πr represents the diameter of the circle.
C 2πr represents the circumference of the circle.
D 2πr represents the portion of the circumference of the circle that the arc spans.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations