[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
According to above statement ~
where,
so, let's plug the value of x as 4 hours to find y ( total money charged by the electrician )
that is ~
So, you owe a total of $ 109 to the electrician ~