
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Transcribed Image Text:3. -
The city of Varad is selling tickets to their annual festival. Based on data from previous
years, the committee in charge of planning for the festival have determined that when p dollars
are charged for a ticket, the city's revenue from ticket sales is R (p) = -0.5p² + 10p thousand
dollars, 0≤ p ≤ 20. R(p) is graphed below.
0
50
40-
-10-
-30
-20-
6
10
12
b. Evaluate R(8) and interpret this point in a sentence.
16
18
a. Use the graph above to estimate the instantaneous rate of change of R(p) when p=8. Interpret
this in a sentence.
20
c. Find the percentage rate of change of R(p) when p=8. Interpret this in a sentence.
d. Draw the tangent line to the graph at p=8. Which of the above values gives the slope of this
line? Explain.
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