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September 19, 2014

Homework Help: Algrbra

Posted by Pete on Wednesday, October 24, 2012 at 3:15pm.

A certain paperback sells for $12. The author is paid royalties of 11% on the first 10,000 copies sold, 12.5% on the next 5000 copies, and 18% on any additional copies. Find a piecewise-defined function R that specifies the total royalties if x copies are sold.

Please help me figure out the rest of this equation. Here is what I have so far.

R(x)=
_____if 0≤x≤ 10000
_____if 10000 < x ≤ 15000
_____if x > 15000

Any help is appreciated! Thanks!

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