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ziro4ka [17]
2 years ago
13

Can someone help on this one because i don’t know if i’m correct

Mathematics
1 answer:
34kurt2 years ago
6 0

Answer:

Yes its C

Step-by-step explanation:

First off the y intercepts + 3 and the line hits it  not -3 so option D is out

Also the slope is negative so Option A and B are out

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Answer:

A

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2 years ago
You are designing a 1000 cm^3 right circular cylindrical can whose manufacture will take waste into account. There is no waste i
asambeis [7]

Answer:

 h /r  =  2.55

Step-by-step explanation:

Area of a can:

 Total area of the can = area of (top + bottom)  + lateral area

lateral area  2πrh    without waste

area of base (considering that you use 2r square)  is 4r²

area of bottom      ( for same reason )                           4r²

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And  A(r)  =   8r² + 2πr(1000)/πr²

A(r)  =   8r² + 2000/r

Taking derivatives both sides

A´(r)   =  16 r    - 2000/r²

If A´(r)  =  0              16 r    - 2000/r²   = 0

(16r³  - 2000)/ r²  =  0        16r³  - 2000  =  0

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h = 12,74  cm

ratio   h /r  =  12.74/5         h /r  =  2.55

   

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