Final answer:
To compare Plan A and Plan B, we need to consider the fixed charges and call charges for each plan. By comparing the cost of each plan at different call durations, we can determine which plan is more cost-effective for Ann.
Step-by-step explanation:
To compare Plan A and Plan B, we need to consider the fixed charges and call charges for each plan. Plan A has a fixed charge of $10 per month and call charges of $0.10 per minute. Plan B has a fixed charge of $15 per month and call charges of $0.08 per minute.
To find the total cost for each plan, we can use the equation:
Plan A cost = $10 + ($0.10 x minutes)
Plan B cost = $15 + ($0.08 x minutes)
By comparing the cost of each plan at different call durations, we can determine which plan is more cost-effective for Ann.