The form of the exponential function is
[tex]f(x)=a(b)^x[/tex]a is the initial amount
b is the growth/decay factor
If b > 1, then it is a growth factor
If b < 1, then it is a decay factor
Since the exponential function is
[tex]f(t)=1100(0.9945)^t[/tex]Then
a = 1100
b = 0.9945
Since 0.9945 < 1, then
The factor is decay
To change it to percent multiply it by 100
0.9945 x 100 = 99.45%
The rate of decrease = 100% - 99.45% = 0.55%
The function is decay exponentially with a factor of 0.55% every week
