Name this structure, the sac of skin.

Name this structure of the digestive system.

Find an equation of the tangent line to the curve  at .

Air is being pumped into a spherical balloon so that its volume increases at a rate of 10 . How fast is the radius of the ballon increasing when the radius is 5 ?

Let , find

Suppose that  and

Which of the following limits represent a derivative of the function ?

Which of the following limits represent a derivative of the function

Which of the following limits represent a derivative of the function  ?

This is an example of _____________________ architecture.