Answer:
The total sales during the promotion is $69.6
Step-by-step explanation:
we are given
The average daily sales at a bookstore was(7.6k + 2.2) dollars over a 4-day promotion
we have to find total sales during 4 days
so, we can integrate it to find total sales
[tex]TS=\int _0^4\:\left(7.6k+2.2\right)dk[/tex]
now, we can solve it
[tex]\int \:7.6k+2.2dk[/tex]
[tex]=\int \:7.6kdk+\int \:2.2dk[/tex]
[tex]=3.8k^2+2.2k[/tex]
now, we can plug bounds
and we get
[tex]=69.6-0[/tex]
[tex]TS=69.6[/tex]
So,
the total sales during the promotion is $69.6
