Jonah is earning P450 per day to do a certain job. Let S be the total salary of jonah and n be the number of days that jonah works.

Express the total salary S as a function of the number of days n that Jonah works?

To express the total salary S as a function of the number of days n that Jonah works, we need to multiply the daily salary by the number of days worked.

Let's break down the problem:

- Jonah earns P450 per day.
- The total salary S is the amount Jonah earns for n days worked.
- The number of days Jonah works is represented by n.

So, the formula to calculate the total salary S can be expressed as:

S = P450 * n

This means that the total salary of Jonah (S) is equal to P450 multiplied by the number of days (n) that he works.