Do I plug in 2.5 and 12 for'x'?
Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.0021718x4 + 0.027326x3 – 0.3367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is 12 years old?

Question

Do I plug in 2.5 and 12 for'x'?  
Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.0021718x4 + 0.027326x3 – 0.3367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is 12 years old?

mertsj · Answer

Well, what does x represent?

anonymous · Answer

x represents the age of a unicorn in equivalent to human years

mertsj · Answer

Yes.  x is the age of the unicorn.  Then later it says "when the unicorn is 2.5 years old"
Don't you reckon that would be x?

anonymous · Answer

yes ty