Urpi wants to buy towels online. There are two stores with the kind of towel she wants.
The first store charges $\$20$ per towel, and the delivery charge is $\$25$.
The total price (in dollars) of an order from the second store (including delivery) as a function of the number of towels is given by the following function:
$\qquad P(n) =35+18n$
**Which store charges more per towel?**
[[☃ radio 1]]
**Urpi needs $15$ towels. Which store is cheaper for her?**
[[☃ radio 2]]