anonymous
  • anonymous
Please help I don't understand this at all..... A right prism with a surface area of 82 square feet and a volume of 42 cubic feet; scale factor 1:2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Is that the entirety of the question?
amistre64
  • amistre64
is a right prism just a cube?
amistre64
  • amistre64
not if it scales to 1:2....got it ;)

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anonymous
  • anonymous
The solid described is similar to a large solid with the given scale factor. Find the surface area and volume of a larger solid
amistre64
  • amistre64
the shape of the solid doesnt matter? or does it. a right prism can be anything as long as it is the same shape stacked up on top of itself.... or am I mistaken?
amistre64
  • amistre64
the easies thing to do is to make it a rectangular prism...i think
amistre64
  • amistre64
82/6 would be a square prism with 6 equal sides ...
amistre64
  • amistre64
but that doesnt work out evenly
amistre64
  • amistre64
Volume = l*w*h = 42 As = Area of faces
amistre64
  • amistre64
im at a loss....sorry...
amistre64
  • amistre64
maybe; 4 side + 2 bases = 82 that would still be a rectanule prism,,,,
amistre64
  • amistre64
if it had square bases then 4wh + 2w = 82 would be simpler
amistre64
  • amistre64
4wh + 2w^2 = 82 42 = w^2h h = 42/w^2 4(42/w) + 2w^2 = 82
amistre64
  • amistre64
168/w + 2w^2 = 82 168 + 2w^3 = 82w 2w^3 -82w +168 = 0 2(w^3 - 41w + 84) = 0 w^3 - 41w + 84 = 0 is what I got so far if I did it right
amistre64
  • amistre64
this just seems harder than what it should be called for :)
amistre64
  • amistre64
and it looks like my w is going negative....... which doesnt bode well for my plans.....
amistre64
  • amistre64
if we knew the original shape for the base of this right prism, id be better to calculate..... other than that....sorry

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