Managing fuel costs is always a challenge in the airline industry as the price of jet fuel can be volatile. In order to analyze fuel needs, a certain company recorded the rate of fuel use by one of their airplanes and the data from that flight is shown below. This data resulted in a twice-differentiable function that is always increasing. t (minutes) F(t) (gallons/minute) 20 30 35 40 40 50 55 70 65 90 70 a. Use data from the table to find an approximation for F'(60). Show how you obtained your answer. Indicate appropriate units.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.5: Graphs Of Functions
Problem 36E
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Managing fuel costs is always a challenge in the airline industry as the price of jet fuel can be volatile. In order
to analyze fuel needs, a certain company recorded the rate of fuel use by one of their airplanes and the data
from that flight is shown below. This data resulted in a twice-differentiable function that is always increasing.
t (minutes)
F(t)
(gallons/minute)
20
30
35
40
40
50
55
70
65
90
70
a. Use data from the table to find an approximation for F'(60). Show how you obtained your answer.
Indicate appropriate units.
b. Suppose that the rate at which the fuel was being used was increasing fastest 45 minutes into the
flight. What is the value of F"(x) at this time? Explain your reasoning.
90
c. Use a right Riemann sum with 5 intervals to approximate the value of F(t)dt. Is your
90
approximation an under-estimate or an over-estimate for the actual value of F(t)dt? Explain your
reasoning.
Transcribed Image Text:Managing fuel costs is always a challenge in the airline industry as the price of jet fuel can be volatile. In order to analyze fuel needs, a certain company recorded the rate of fuel use by one of their airplanes and the data from that flight is shown below. This data resulted in a twice-differentiable function that is always increasing. t (minutes) F(t) (gallons/minute) 20 30 35 40 40 50 55 70 65 90 70 a. Use data from the table to find an approximation for F'(60). Show how you obtained your answer. Indicate appropriate units. b. Suppose that the rate at which the fuel was being used was increasing fastest 45 minutes into the flight. What is the value of F"(x) at this time? Explain your reasoning. 90 c. Use a right Riemann sum with 5 intervals to approximate the value of F(t)dt. Is your 90 approximation an under-estimate or an over-estimate for the actual value of F(t)dt? Explain your reasoning.
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