Final answer:
The inequality that represents the situation when the monthly cost at store A is less than the monthly cost at store B is 3.50m + 7.00 < 8.00.
Step-by-step explanation:
To represent the situation when the monthly cost at store A is less than the monthly cost at store B, we need to compare the two costs. Let m represent the number of movies rented. The monthly cost at store A is given by the expression: 3.50m + 7.00. The monthly cost at store B is simply 8.00. To represent that the monthly cost at store A is less than the monthly cost at store B, we use the inequality 3.50m + 7.00 < 8.00. So the correct answer is option A: 3.50m + 7.00 < 8.00.