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Andrews [41]
3 years ago
7

Need help asap please thanks

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
4 0
That would be x=-8 as it asks for a ventricle line.
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A rectangular garden is to be constructed using a rock wall as one side of the garden and wire fencing for the other three sides
givi [52]

Answer:

x  =  28 m

y  =  14  m

A(max)  =  392 m²

Step-by-step explanation:

Rectangular garden    A (r ) =  x * y

Let´s call x the side of the rectangle to be constructed with a rock wall, then only one x side of the rectangle will be fencing with wire.

the perimeter of the rectangle is  p  =  2*x  +  2*y    ( but in this particular case only one side x will be fencing with wire

56   =   x    +  2*y      56   -  2*y  =  x

A(r)   =  ( 56  -  2*y ) * y

A(y ) =  56*y  -  2*y²

Tacking derivatives on both sides of the equation we get:

A´(y )  =  56  - 4 * y        A´(y) = 0     56  -  4*y  =  0    4*y  =  56

y =  14 m

and x  =  56  - 2*y    =  56 - 28  = 28 m

Then dimensions of the garden:

x  =  28 m

y  =  14  m

A(max)  =  392 m²

How do we know that the area we found is a local maximum??

We find the second derivative

A´´(y)  = - 4     A´´(y)  <  0   then the function A(y) has a local maximum at y = 14 m

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Your job is to design a open topped, rectangular box of minimum cost. Suppose the box is to be of volume cubic cm; and the cost
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 You would pay 24 dollars and the box would be 24 cubic feet.
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How much would you have to
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Because the account is compounded continuously, Euler number is required

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Please help me out with this
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that is the solution to the question

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How to do multiplying radical expressing
8_murik_8 [283]
The answer is
8 \sqrt{6}
. I've demonstrated the 'split and combine' method in the image attached.
This principal is based on the fact that you can multiply and divide radicals as you would with regular integers, but you remember that the answers remain as radicals unless the number you're dealing with is a square (e.g. 9, 16, 25).

6 0
3 years ago
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