SOLUTION: A new movie premiered on Friday September 2, and 1350 people attended.Attendance then decreased by 20% each day. Write an exponential decay function to model this situation.Then fi

Question 1027488: A new movie premiered on Friday September 2, and 1350 people attended.Attendance then decreased by 20% each day. Write an exponential decay function to model this situation.Then find the attendance on September 7
Answer by JoelSchwartz(130) (Show Source): You can put this solution on YOUR website!
y=1350
y-.2y=1,080
1,080-.2*1,080=864
z=percent of 1350 that equals 864
1350z=864
z=864/1350
z=.64
.8y=1,080
.64y=864
x=number of days after September second
1350*.8^x
1350*.8^(5)=442.368
The attendance on September seven would be four hundred forty two people.
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