Final answer:
The total phone bill will be $27.50 for using 525 minutes on a wireless plan that has a $25 fixed cost and charges $0.10 per minute after 500 minutes.
Step-by-step explanation:
The question involves calculating the expected bill for using a wireless phone plan based on a fixed cost and an additional variable cost for minutes used over a certain threshold. The fixed cost of the phone plan is $25 per month, and there's an additional charge of $0.10 per minute for each minute over 500. You used 525 minutes and therefore exceeded the threshold by 25 minutes. To calculate your total phone bill, multiply the number of extra minutes you used by the cost per minute and add this to your fixed monthly charge.
Extra minutes used = Total minutes used - Threshold minutes
Extra minutes used = 525 - 500 = 25 minutes
Additional cost for extra minutes = Extra minutes used × Cost per minute
Additional cost for extra minutes = 25 × $0.10 = $2.50
Total phone bill = Fixed monthly charge + Additional cost for extra minutes
Total phone bill = $25 + $2.50 = $27.50