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

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

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

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