Answer:
9x^2
Step-by-step explanation:
-4/x^2 6/9x
-36/9x^2 6x/9x^2
The Kangaroo Rat and the common tree shrew is familiar because the kangaroo rat and the tree shrew have the same class: Mammalia, same phylum: Chordata, and the same kingdom : Animalia. They both are identical because they are small look like small rats etc.
Answer:
The surface is a cylindrical surface with radius 7 units
Step-by-step explanation:
The equation is properly written as:

The above equation takes the form 
Where 

and 


r = 7 units
The surface is a cylindrical surface with radius 7 units