In the diagram, point B is a point of tangency. Find the radius r of ⨀C. What is the radius r of ⨀C?
Please show all the work on how you got your answer.
You do not have to explain, all I want is the work.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form