Need some help with this math

Answer:
4 $ on tax and 36 $ on purchase.hope this helps
Step-by-step explanation:
Answer:
$44
Step-by-step explanation:
Let's set a proportion.
$40 - 100%
$x - 10%
(40 x 10) : 100= $4.
We found out how much is that 10% BUT Steve payed this amount on top of $40. So, $40+$4= $44.
So select 44