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 2 years ago
. The function y =41 ? 0.95
x
models the difference (in minutes)
between men’s and women’s ﬁnishing times for the Boston
Marathon. The number of years since women ﬁrst ofﬁcially ran the
race in 1972 is represented by x.
a. Does the exponential function represent growth or decay?
b. Estimate the difference between ﬁnishing times in 1990.
c. Predict the difference between ﬁnishing times in 2005.
 2 years ago
. The function y =41 ? 0.95 x models the difference (in minutes) between men’s and women’s ﬁnishing times for the Boston Marathon. The number of years since women ﬁrst ofﬁcially ran the race in 1972 is represented by x. a. Does the exponential function represent growth or decay? b. Estimate the difference between ﬁnishing times in 1990. c. Predict the difference between ﬁnishing times in 2005.

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