Posted by **janice** on Wednesday, February 2, 2011 at 7:57pm.

Consider that the age,x,of a unicorn in human equivalent years can be given by the formula f(x)= -0.002718x^4+0.097326x^3-1.3367x^2+12.46x+3.914. When a unicorn is 2.5 years old, what is its age in human eqivalent years? What about when it is 12 years old?

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