I need help finding the answer to these questions The population age 65 and over

Question

I need help finding the answer to these questions

The population age 65 and over (in millions) of developed countries from 2005 through 2034 is projected to be ft) = 3.567t + 175.2 (5 t 35) where t is measured in years and t = 5 corresponds to 2005 t. On the other hand, the population age 65 and over of underdeveloped emerging countries over the same period is projected to be g(t) = 0.46t2 + 0.16t + 287.8 (5 s t s 35). (a) What does the function D g + f represent? The total population aged under 65 of the developed and the underdeveloped/emerging countries. The difference in population aged 65 and over, between the developed and the developing/emerging countries. The difference in population aged under 65, between the developed and the developing/emerging countries. The total population aged 65 and over of the developed and the underdeveloped/emerging countries. (b) Find D't) and D(10) D'(t)-·921+ 3.727 12.927 D'(10)= Interpret your results. The difference in population aged 65 and over is falling at the rate of D(10) million people per year in 2010. OThe difference in population aged under 65 is falling at the rate of D(10) million people per year in 2010. The total population aged 65 and over is growing at the rate of D(10) million people per year in 2010. The total population aged under 65 is growing at the rate of D(10) million people per year in 2010.

Explanation / Answer

a. the answer is 'D' , it refers the total population aged 65 and over of the developed and underdeveloped/emerging countries.

b. the answer is 'C' , the derivative is refer to the rate of change in D(t). the derivative is positive at t=10 years , so , it refers the total popualtion aged 65 and over is growing at the rate .

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.