There are four different sets of objects shown in the answer choices. Select all of the sets of objects that could be modeled by perpendicular lines.

A.
Two roads that meet at an intersection.

B.
A tree and its shadow on the ground.

C.
The top of a desk and the floor.

D.
Two stars seen in the sky.

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

Use the given information to determine the exact trigonometric value.

What are two numbers that have a sum of 15