3. The fuel used by a car is definedby f(x)=3x=/80-6x+245. where x is thetravelling speed in km/h.What is the most economical speed ofthe car? in other words, determine thespeed of the car which uses the leastamount of fuel.

The fuel used by the car is given by the function: f(x)=310x2-6x+245 where x is the speed of the…

Answered: 3. The fuel used by a car is defined by…

Calculus: Early Transcendentals

8th Edition

ISBN:9781285741550

Author:James Stewart

Publisher:James Stewart

Chapter1: Functions And Models

Section: Chapter Questions

Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...

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Find the instantaneous rate at which the average cost is changing when 5 televisions are produced, and interpret the answer.
The height h (in feet) of the cloud basecan be estimated using h = 227(T - D ), where T is theground temperature and D is the dew point. If the temperature is 70F and the dew point is 55F, find the height of the cloud base.
PLEASE ANSWER ALL ITEMS ASAP THANK YOU
The following equation represents the relationship between hours of TV watched per day (x) and the number of situps a person can do (ŷ).ŷ = -1.257xx + 23.179Use this model to predict the number of situps a person who watches 8 hours of TV can do. (to 2 decimal places)
The following equation represents the relationship between hours of TV watched per day (x) and the number of situps a person can do (ŷ).ŷ = -0.956xx + 34.573Use this model to predict the number of situps a person who watches 8 hours of TV can do. (to 2 decimal places)
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The following equation represents the relationship between hours of TV watched per day (x) and the number of situps a person can do (ŷ).ŷ = -0.895xx + 32.409Use this model to predict the number of situps a person who watches 2.5 hours of TV can do. (to 2 decimal places)
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The following equation represents the relationship between hours of TV watched per day (x) and the number of situps a person can do (ŷ).ŷ = -0.777xx + 36.057Use this model to predict the number of situps a person who watches 3 hours of TV can do. (to 2 decimal places)

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3. The fuel used by a car is defined by f(x)=3x=/80-6x+245. where x is the travelling speed in km/h. What is the most economical speed of the car? In other words, determine the speed of the car which uses the least amount of fuel.