anonymous
  • anonymous
help!
Mathematics
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anonymous
  • anonymous
help!
Mathematics
schrodinger
  • schrodinger
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
yes
anonymous
  • anonymous
anonymous
  • anonymous
yes @geny55 ?

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anonymous
  • anonymous
is this a pretest?
anonymous
  • anonymous
Astrophysics
  • Astrophysics
Perimeter is the distance around the 2d shape, so |dw:1433638990215:dw| add all the numbers for the perimeter and the area of a rectangle is just length x width\[Area = l \times w\] once you have that you can multiply both of them by 7.5.
anonymous
  • anonymous
so i do 6+6+8+8? @Astrophysics
Astrophysics
  • Astrophysics
Yes that's the perimeter
Astrophysics
  • Astrophysics
But you must multiply it by 7.5 for the scale factor
anonymous
  • anonymous
i got 210
Astrophysics
  • Astrophysics
Sounds good, now find the area
anonymous
  • anonymous
how
anonymous
  • anonymous
??
Astrophysics
  • Astrophysics
Read what I've said above
anonymous
  • anonymous
whats the area?
anonymous
  • anonymous
210?
Astrophysics
  • Astrophysics
No that's the perimeter, the area of a rectangle is length multiplied by the width.
anonymous
  • anonymous
and whats the length and width
anonymous
  • anonymous
Astrophysics
  • Astrophysics
You should really know this by now, |dw:1433640168475:dw| Note that the scale factor for area, the change in area is equal to the scale factor squared, which means the scale factor for area is \[7.5^2\]
anonymous
  • anonymous
so its 6 x 8
Astrophysics
  • Astrophysics
That's for the unscaled rectangle, yes.
anonymous
  • anonymous
so thats the length x width
Astrophysics
  • Astrophysics
Yes
anonymous
  • anonymous
ok so whats the area
Astrophysics
  • Astrophysics
I feel as if you're ignoring everything I've said
anonymous
  • anonymous
im not I'm learning :) @Astrophysics
anonymous
  • anonymous
i got d
Astrophysics
  • Astrophysics
ok
anonymous
  • anonymous
am i right? @Astrophysics
Astrophysics
  • Astrophysics
How did you get the area?
anonymous
  • anonymous
area = 6 x 8 6 x 7.5= 45 8 x 7.5= 60 is that right? @Astrophysics
Astrophysics
  • Astrophysics
Not quite, nice try though. Remember what I said to note earlier: `Note that the scale factor for area, the change in area is equal to the scale factor squared, which means the scale factor for area is`\[7.5^2\]
Astrophysics
  • Astrophysics
\[area = l \times w \times 7.5^2\]
anonymous
  • anonymous
i got 2,700
Astrophysics
  • Astrophysics
Good!
anonymous
  • anonymous
yay!

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