Posted by **Jake** on Sunday, March 4, 2012 at 3:19pm.

The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400).

a) Determine the legal speed speed that will maximize the fuel efficiency if the speed limit is 50 km/h.

The answer is 50 km/h but my teacher said it can't be that. Any explain please.

------------------------------------

b) Determine the speed intervals, within the legal speed limit of 0 km/h to 100 km/h, in which the fuel efficiency is increasing.

## Answer This Question

## Related Questions

- Calculus - The fuel efficiency, E, in litres per 100 km, for a car driven at ...
- Calculus - The fuel efficiency, E, in litres per 100 km, for a car driven at ...
- math - The fuel efficiency for a certain midsize car is given by E(v)= -0.016v^2...
- algebra - The fuel efficiency for a certain midsize car is given by E(v)= -0....
- Algebra - The fuel efficiency for a certain midsize car is given by E(v) = &#...
- algera - The fuel efficiency for a certain midsize car is given by E(v) = −...
- Algebra - The fuel efficiency for a certain midsize car is given by E(v) = &#...
- math - a car travels at a constants speed and uses G(x) litres of gas per ...
- Rational Functions Word Problem - A car travels at a constant speed and burns g(...
- Math - Advanced Functions - the function f(x)=-0.005x^2+0.8x+12 models the ...

More Related Questions