Question

The average daily sales at a bookstore was(7.6k + 2.2) dollars over a 4-day promotion.Find the total sales during the promotion.

Answer 1

The total sales during the promotion is $69.6

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

`TS=\int _0^4\:\left(7.6k+2.2\right)dk`

now, we can solve it

`\int \:7.6k+2.2dk`

`=\int \:7.6kdk+\int \:2.2dk`

`=3.8k^2+2.2k`

now, we can plug bounds

and we get

`=69.6-0`

`TS=69.6`

So,

the total sales during the promotion is $69.6