In this exercise, we consider data from the Statistical Abstract of the United States on the fraction of women married for the first time in 1960 whose marriage reached a given anniversary number. The data show that the fraction of women who reached their fifth anniversary was 0.928. After that, for each one-year increase in the anniversary number, the fraction reaching that number drops by about 2%. These data describe constant percentage change, so it is reasonable to model the fraction M as an exponential function of the number n of anniversaries since the fifth.

(a) What is the yearly decay factor for the exponential model? 

(b) Find an exponential model for M as a function of n. (Let 

n = 0 represent the fifth anniversary.) M= 

(c) According to your model, what fraction of women married for the first time in 1960 celebrated their 40th anniversary? (Take 

n = 35.) Round your answer to three decimal places.


ps. I saw that someone had this exact problem on here, I have parts a and c answered. I couldnt understand how they came up with part b though. I'm stressing right now. All of my college classes are online due to Covid-19 and I loathe online classes. Any help is appreciated. 

 Mar 25, 2020

Take a look at this: https://web2.0calc.com/questions/college-algebra-6


Hope this helped!!!

 Mar 25, 2020

I typed about that in the problem when I typed ps. But thanks for posting anyway. smiley

Shaezy  Mar 26, 2020

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