Thursday

April 17, 2014

April 17, 2014

Posted by **INEEDHELP!!!** on Monday, October 1, 2007 at 7:33pm.

a) express the area in terms of x and state the domain of the area function

b)find the value of x that gives the greatest area.

my teacher didn't explain how to do this so im not sure, please help!

- pre-calc -
**bobpursley**, Monday, October 1, 2007 at 8:04pmperimeter= 2s + l

120=2s + l

area= sl= s(120-2s)

Take the deriviative of area with respect to s, set to zero, and find s,l.

- pre-calc -
**bobpursley**, Monday, October 1, 2007 at 8:05pmOooppps. If you are in precal, you may not know derivative yet. In that case, graph A vs s, look for the max A, read where s is, then solve for l knowing s.

- pre-calc -
**Anonymous**, Monday, October 15, 2012 at 8:11pm265wxjb

**Related Questions**

Calculus - A farmer has 120 meters of wire fencing to make enclosures for his ...

math - Ex. 120 m of fencing is to be used to form three sides of a rectangular ...

Algebra - Suppose a farmer has 120 feet of fencing to make a rectangular ...

Math - Suppose a farmer has 120 feet of fencing to make a rectangular barnyard ...

Algebra - A builder has 80 feet of fencing to create an enclosure adjacent to a ...

Calculus - A construction company wants to build a rectangular enclosure with an...

Math Calculus - Three sides of a fence and an existing wall form a rectangular ...

math - A farmer plans to enclose a rectangular region, using part of his barn ...

geometry - a field bounded on one side by a river is to be fenced on three sides...

calculus optimization problem - A farmer has 460 feet of fencing with which to ...