A study found that the divorce rate d (given as a percentage) appears to depend on the ratio r of available men to available women. This function can be approximated by
?
?
There are currently 0.8 available men per available woman in Littleville, and this ratio is increasing by 0.1 per year. At what percent is the divorce rate decreasing?
?
A. 0.4% per year
B. 0.08% per year
C. 10% per year
D. 4% per year
E. 10.1% per year
Answer: D
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