The document is a calculus homework assignment with various problems related to derivatives, rates of change, and critical points. Below is a brief description of the questions:

1. Related Rates (Cone Problem): Sand forms a conical pile, and the task is to determine the rate at which the height increases when the height reaches 15 feet.
2. Related Rates (Trough Problem): Water is poured into a trough, and you are asked to find the rate at which the water level rises when the water is 8 feet deep.
3. Lighthouse Problem: The beam of light from a lighthouse rotates, and the goal is to find how fast the beam moves along a shoreline.
4. Ladder Problem: A ladder slides down a wall, and you must find the velocity and acceleration of the top of the ladder when the bottom is 16 feet away from the wall.
5. Increasing/Decreasing Functions: Various functions are provided, and the task is to determine intervals where the functions are increasing or decreasing.
6. Continuity and Derivatives: Analyze a piecewise function for continuity, increasing/decreasing behavior, and points where the derivative does not exist.
7. Critical Points and Local Extrema: For each function, find the critical values and use the first derivative test to classify each as a local minimum, maximum, or neither.
8. Critical Points with Piecewise Function: A piecewise function involving absolute values is given, and the first derivative test is used to classify the critical points.
9. Graph of Derivative: Given the graph of a derivative, find the critical values and use the first derivative test.

Let me know if you'd like a detailed explanation or solution to any specific problem!

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Follow-up Questions:

1. Would you like the solution to the cone problem (Problem 1)?
2. Do you need help with the water trough problem (Problem 2)?
3. Should I go over how to find critical points for the functions (Problem 5 or 6)?
4. Would you like help with the lighthouse problem (Problem 3)?
5. Do you need further explanation on piecewise functions or critical points (Problem 8)?

Tip: When solving related rates problems, always start by identifying the geometric relationships and then use the chain rule to relate the rates of change of the variables.