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| PAGE: 309 | SET: Exercises | PROBLEM: 118 |
The sales of a seasonal product model is 
, where 
is the time in months.
(a) Find the average sales for first quarter 
.
Definition of the Average Value of a Function on an Interval:
If 
is integrable on the closed interval 
, then the average value of 
on the interval is 
.
In this case 
and 
.
The sales of a seasonal product model is 
.
The average value of first quarter is 
.
.
The average sales for first quarter is 
.
(b) Find the average sales for first quarter 
.
In this case 
and 
.
The sales of a seasonal product model is .
The average value of second quarter is 
.
.
The average sales for second quarter is 
.
(c) Find the average sales for entire year 
.
In this case and 
.
The sales of a seasonal product model is .
The average value of entire year is,
.
The average sales for entire year is 
.
(a) The average sales for first quarter is .
(b) The average sales for second quarter is .
(c) The average sales for entire year is 
.
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