your cell phone carrier charges $0.18 for each extra minute over your limit.if the total shows that you owe $3.24 for extra minutes, how many minutes did you go over
If you have [tex] \dfrac{1 \ min}{0.18 \ dollars} [/tex] as your cost, and you paid [tex]3.24 \ dollars[/tex], then [tex](\dfrac{1 \ min}{0.18 \ dollars})(3.24 \ dollars)=18 \ min[/tex].
Thankfully, most cellphone companies don't charge for minutes anymore!
