The number y of raccoons in an area after x years can be modeled by the function y= 0.4x^2+2x+2. When were there about 50 raccoons in the area . Round your answer to the nearest year

9 years.

Step-by-step explanation:

For 50 raccoons the equation is

0.4x^2+2x+2 = 50

0.4x^2+2x - 48 = 0

x =  [-2 +/- sqrt(2^2- 4* 0.4*(-48)] / (2*0.4)

= (-2 +/- sqrt 9) / 0.8

=  8.74 , - 13.75   (ignore the negative).

So it's 9 years.

i'm sorry i don't know

step-by-step explanation:

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation: