Answer: 1.12 ≤ x ≤ 34.18
Explanation
As the company wants to keep its profits at or above $75,000, we have to search for those values of tires produce (x) that maintain the profits at or above $75,000. Based on this we can conclude that the negative numbers do not give this profit, and 0 tires is below $75,000. Thus, the best approximation is:
Additionally, we can prove this by making the function equal 75:
[tex]75=−0.34x^2+12x+62[/tex][tex]0=−0.34x^2+12x+62-75[/tex][tex]0=−0.34x^2+12x-13[/tex]Using the General Quadratic Formula we get that:
[tex]x_1=1.12[/tex][tex]x_2=34.18[/tex]