For all of the following questions, use this data:

the incidence rate per 100,000 per year for lung cancer is 7 among nonsmokers and 71 among smokers. the incidence rate per 100,000 per year for coronary thrombosis is 422 among nonsmokers and 599 among smokers. the prevalence of smoking in the population is 55%.

a) what is the percent population attributable risk of coronary thrombosis due to smoking?

b) so based on your calculations, if you could magically stop everyone from smoking tomorrow, which disease would show a larger drop in incidence (be sure to explain your answer)?

A. The degree of the function is at least 4

B. At least 3 positive real zeros

Step-by-step explanation:

From the table we can see that the value of the polynomial function is first negative, then positive (1 intersection with x-axis), then again negative (second intersection with x-axis), then again positive (third intersection with x-axis), and at last again negative (fourth intersection with x-axis).

The point of intersection with x-axis corresponds to the zero of the function (f(x)=0). Since the graph of the function intersects 4 times the x-axis, the degree of the polynomial function is at least 4.

the first point of intersection with x-axis has negative x-coordinate. All other points have positive x-coordinates. This means the function has zt least 3 positive real zeros.