Posted by willa on .
Thge function D(x) models the cumulative number of deaths from a disease x years after 1984. Estimate the year when ther were 89,000 deaths. D(x) = 2386x^2 +5147x + 5398. there were approximately 89,000 deaths in the year?

math The function D(x) models the cumulative numbe 
Anonymous,
D(x)=2386x^2+5147x+5398=89000
2386x^2+5147x+539889000=0
2386x^2+5147x83602=0
If you don't know solve that equation in google type:
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadratic Formula
When page be open in rectangle type:
2386x^2+5147x83602=0
and click option solve it.
You will see solution step by step.
4.94 approx = 5
Approximately the year=1984+5=1989