### Home > CALC > Chapter 7 > Lesson 7.1.1 > Problem 7-9

7-9.

Sand is being poured into a sandbox, making a conical pile with radius *r* and volume *V*. Explain what

Remember that a derivative represents a slope, or rate of change.

7-9.

Sand is being poured into a sandbox, making a conical pile with radius *r* and volume *V*. Explain what

Remember that a derivative represents a slope, or rate of change.