A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Ok so i have a few questions.
When graphing y>x^2 you can only use quadrant one right?
Also i have a word problem that goes like thisSuppose you have 80 ft of fence to enclose a rectangular garden.
The function A = 40x  x2 gives you the area of the garden in square feet
where x is the width in feet. and then it has two parts... a. What width gives you the maximum gardening area? and b. What is the maximum area? Please help because I have no idea what to do. Thanks :)
anonymous
 5 years ago
Ok so i have a few questions. When graphing y>x^2 you can only use quadrant one right? Also i have a word problem that goes like thisSuppose you have 80 ft of fence to enclose a rectangular garden. The function A = 40x  x2 gives you the area of the garden in square feet where x is the width in feet. and then it has two parts... a. What width gives you the maximum gardening area? and b. What is the maximum area? Please help because I have no idea what to do. Thanks :)

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1unless the problem restricts it; you can use any quadrant that is available to use

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.12l+2w=80 thats your perimeter right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1and Area = x*y correct?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1A=l*w..i really should keep my variables consistent

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1with the perimeter we can slve for one of the variables... you want l or w?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1either way its the same....and the max area is a square in the end as you will see...hopefully ;)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1l=(802w)/2 = 40w substitute this 'value' into the area formula A = w(40w) A = 40w w^2

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1which is what they gave you in the wording; i just went the long way to get to it

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1now, do you know what the graph of this thing looks like?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1its an upside down 'U'

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1so the highest point gives you the maximum area possible

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1what do you know about the graph? i can throw out alot of technical names that might mean nothing to you...

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the highest point is when w=20.. which is the vertex of the graph we know that 2w + 2l = 80 2(20) +2l = 80 40 +2l = 80 2l = 40 l = 40/2 = 20 the width is 20, the length is 20 ..its a square :)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the max area is 20(20) = 400 square ....feet? yeah, feet
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.