# Application Practice

Ticket Sales

Living in or near a metropolitan area has some advantages. Entertainment opportunities are almost endless in a major city. Events occur almost every night, from sporting events to the symphony. Tickets to these events are not available long and can often be modeled by quadratic equations.

Application Practice

Answer the following questions, presenting your work as appropriate. Answers without justification will receive minimal credit. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting.

1. Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager with a quadratic equation that models the expected number of ticket sales for each day t. ( t = 1 is the day tickets go on sale).

Number of tickets sold on day t = -0.1t^2 + 5.8t + 23

a. Does the graph of this equation open up or down? How did you determine this?

b. Describe what happens to the tickets sales as time passes.

c. Use the quadratic formula to determine the last day that tickets will be sold. Give your answer as a day number—it should not be a fraction, so you do need to test days numbers, not just round.

d. Will tickets peak or be at a low during the middle of the sale? How do you know?

e. On which day will the peak or low occur?

f. How many tickets will be sold on the day when the peak or low occurs?

g. What are the coordinates of the vertex? How does this number relate to your answers in parts e. and f?

h. How many solutions are there to the equation t = -0.1t^2 + 5.8t + 23? How do you know?

i. What do the solutions represent in this situation? (That is, not “x-intercepts or t-intercepts of the graph” – something about ticket sales.) Is there a solution that does not make sense? If so, in what ways does the solution not make sense?

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