Saturday

January 31, 2015

January 31, 2015

Posted by **Melanie** on Friday, July 15, 2011 at 4:51pm.

- College Algebra -
**bobpursley**, Friday, July 15, 2011 at 5:51pmPerimeter = 3w+4L=100

area= 2LW

but W=(100-4L)/3

area=2L (100-4L)/3

take the derivative with respect to L, set to zero, and solve for L, then go back and find W.

- College Algebra -
**bobpursley**, Friday, July 15, 2011 at 5:54pmOoops. You are not a calculus student yet.

area=2L(100-4L)/3= 200L/3 -8L^2/3

This is a parabola, with zeroes at L=25, and L=0. So max must be halfway between, L=25/2

if L = 25/2 then W=(100-50)/3 and that is it.

- College Algebra -
**Melanie**, Friday, July 15, 2011 at 6:41pmThank you bobpursley!

**Answer this Question**

**Related Questions**

Algebra - Math - A farmer has 100 yards of fencing with which to enclose two ...

Math - A farmer with 8000 meters of fencing wants to enclose a rectangular plot ...

Algebra - Word Problems: 1. A farmer has 2400 feet of fencing and wants to fence...

College Math - farmer wishes to fence a rectangular area along the river bank. ...

Algebra 2 - A farmer has 120 ft. of fencing available to enclose 2 adjacent ...

algebra - A farmer decides to enclose a rectangular garden, using the side of a ...

College Algebra - A farmer wants to build a rectangular fence using the side of ...

Pre-Calculas 11 - a farmer wants to build two pens (one for cows, the other for ...

intermediate algebra - A farmer with 3000 feet of fencing wants to enclose a ...

Algebra 2 - A farmer wants to enclose 2 adjacent rectangular regions next to a ...