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Here's the question you clicked on:
bearface0104
how do you solve this proportion 3/r=4/11
cross multiply.
do you know how to do that?
http://www.youtube.com/watch?v=Uv_hPQfJE4g
here's it explained if the site didn't help you...to cross multiply, you do 3•11 = 4•r 33=4r (divide both side by 4) r = 8.25
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