Answer: 
Step-by-step explanation:
Given
The area of the base is given by 
The height of the container is 
The volume of the cylindrical container is

Insert the values

From the given figure, we observe that,
The relationship between the variables is,
As the number of sunny days increases, the number of lost umbrellas tends to decrease.
Hence, the correct option is C.
Answer:
49x^4-42x^2 y+9y^2
Step-by-step explanation:
The volume of the cylinder is the area of the base (a circle) times the height (you can immagine taking a disk, the base, and translate it along the height to "fill" the cylinder).
So you have: