Erinn's basic cell phone plan charges $54.99 for service plus $0.24 per minute beyond the including 500 minutes in the plan. how much will it cost erin if she used her cell phone for 690 minutes in one month?

We can first find how many minutes were not incleded in the plan:

690-500
=190

She used phone call for 190 minutes beyond the included 500 minutes, and the extra fee it would cost is:

190 × 0.24
=$45.6

We can then find the total cost:

45.6+ 54.99
=$100.59

Therefore the answer is $100.59.

Alternatively:
54.99+190×0.24
=54.99+45.6
=$100.59

Hope it helps!

The first one is correct