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small calculation that i forgot how to do.. 1Q fractions watch

1. Well basically i need to get r2​ on its own, only one problem i forgot how to do that . Help? Also its a question on comparative pie charts just saying...

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2. (Original post by ko111)
what would you do to move 100 to the right?
That what i forgot to do. ^^
gosh i feel dumb...
3. (Original post by moththecat)
That what i forgot to do. ^^
gosh i feel dumb...
i confused myself lol sorry don't move 100 to the right but move r^2.
4. (Original post by ko111)
actually sorry lol that will make it harder.. try to move r^2 to the right instead of the 100.
really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?
5. (Original post by moththecat)
really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?
should be right.. sub r into the original equation (not the rounded value) and see what the answer is
6. (Original post by moththecat)
really?
if i try this then i get 100=29.6/23.7 x r2
80.06756757=r2
8.95(2dp)= r

Right?
yep just checked it's right

remember when writing your answers show all steps so you can get all the marks.
7. (Original post by ko111)
yep just checked it's right

remember when writing your answers show all steps so you can get all the marks.
Ok, thanks!
8. (Original post by moththecat)
Ok, thanks!
no problem!
9. (Original post by ko111)
yep just checked it's right

remember when writing your answers show all steps so you can get all the marks.
^^ so for the 1st step write () on both sides to let the examiner know how you're trying to get r^2 on its own..

(Original post by moththecat)
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