max/min problem (1 Viewer)

[astroman]

 

[seventhroot]

general steps

> diff it
> set == 0
> solve for x (answer: 15/2)
> test that it is a minimum

 

[theodore0307]

View attachment !!!ch 2 summary.pdf

I posted this on my wall and helped alot.

 

[astroman]

View attachment 31235

I posted this on my wall and helped alot.

thanks

 

[astroman]

how do i get the area?

 

[plutonium-238]

Differentiate the area first and then let it equal to zero and solve for x. After that, sub back into A.

 

[integral95]

alternatively, you could use the formula since you're dealing with parabolas

 

[ConorDevaney]

^ if you asking how you feet from the perimeter and sides equaling zero, you make 60 (the perimeter) equal to the sums of the sides. Therefore 60 = (30 - x) + (30-x) + x +x. Therefore area = x . (30 -x). Therefre area = 30x -x^2