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99.2% of ATMs levy a surcharge on users who are not account

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99.2% of ATMs levy a surcharge on users who are not account holders.The
amount of the surcharge for non-account holders can be modeled as
s(t) = 0.72(1.081t) dollars
where t is the number of years since 1995,data from 3 ≤ t ≤ 13.†
(a) Calculate the average rate of change in the amount of the
surcharge for non-account holders between 2000 and 2007.Write the
result in a sentence of interpretation.(Round your answer to two
decimal places.)
Between 2000 and 2007,the ATM surcharge for non account holders increased by an average of $________
per year.
(b) Calculate the change and the percentage change in the
amount of the surcharge for non-account holders between 2000 and 2007.
(Round your answers to two decimal places.)
change
$_________
percentage change
____________
%
只需要三个空的答案,
表达式是s(t) = 0.72(1.081的t次方)
S(t)= 0.72*1.081^t  (t=年份-1995,且3≤T≤13),则计算如下:

1、0.52
2、3.65
3、220.44%