The change from religious to lay teachers at Roman Catholic schools has been partly attributed to the decline in the number of women and men entering religious orders. The percent of teachers who are lay teachers is given by 
where t is measured in decades, with 
style="vertical-align:middle;" /> corresponding to the beginning of 1960.
?
Find the year when the percent of lay teachers was increasing most rapidly.
?
A. 1985
B. 1962
C. 1976
D. 1986
E. 1989
Answer: E
Mathematics
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= 6x5
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