The average annual income I in dollars of a lawyer with an age of x years is modeled with the following function
I=-425x^2+45,500x-650,000
according to the model , at what average age do lawyers earn their maximum average annual income?

Question

The average annual income I in dollars of a lawyer with an age of x years is modeled with the following function 
I=-425x^2+45,500x-650,000
according to the model , at what average age do lawyers earn their maximum average annual income?

anonymous · Answer

They earn there maximum income at an age of $$\frac{910}{17} 	ext{Years}$$

anonymous · Answer

ok thank you

anonymous · Answer

so rounding to the nearest year is 54

anonymous · Answer

Yes sir

mww · Answer

you can use the vertex for a quadratic. x = -b/2a

anonymous · Answer

yes you could do that