True: A face of a polyhedron is simply a flat boundary that helps forms the 3D solid.
Answer:
(c) 
Step-by-step explanation:
Given
The attached graph
Required
Find h(3)
The formula to use in solving this is:

Substitute 3 for x

From the attached graph, the value od x = 3 points to the value of y = 1.
So, we have:

The group of tiles represent answer A. There are 6 x² tiles, 3 x tiles, and 1 tile.
3 x
---------= --------- ---------
15 180
15x=540
----- ------= 36 students.
15 15
Steps: Cross multiply to get 15x and 540. Divide both numbers by 15, then you found what x equals, which is the answer.