What is the ratio in simplest form 20: 10

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

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?

Which expression gives the exact value of x?