1. Education
Send to a Friend via Email
You can opt-out at any time. Please refer to our privacy policy for contact information.

Discuss in my forum

Quadratic Word Problems - Volume of a Song


The Wallisville Shore High School Orchestra is recording a song. To ensure that the ensemble sounds its best, the audio technician measures the volume of the music over the course of the song.  The following function depicts the relationship between the volume and time of the song.

V = -1.875t2 + 30t, where V is the volume in decibels and t is time in minutes.

Use the function to complete the following exercises.



Answers and Explanations

1. Find any zeros of the function.



2. Find the y-intercept of the function.



3. Find the line of symmetry of the function.



4. Find the vertex of the function.



5. Sketch the graph of this function. Label the zeros, line of symmetry, vertex, and y-intercept.



6. How long does the orchestra perform the song?



7. What is the peak volume (as measured in decibels) of the song?



8. How much time elapses when the song is at its peak volume?




  1. About.com
  2. Education
  3. Mathematics
  4. Math Help and Tutorials
  5. Algebra
  6. Algebra 1 Help
  7. Quadratic Equations
  8. Exercises
  9. Quizzes
  10. Quadratic Word Problems - Volume of a Song

©2014 About.com. All rights reserved.