Question 1157290
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<pre>

 . . . then N = {{{25/0.05}}}.


Use your calculator, or calculate manually.
</pre>

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On proportions,  &nbsp;see this VERY FIRST introductory lesson 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/proportions/lessons/-Proprtions.lesson>Proportions</A>

in this site.