An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
A current of 15.0 A over 30 seconds corresponds to a total charge of 450 C . This amount of charge equals approximately 2.81 × 1 0 21 electrons flowing through the device. Thus, about 2.81 × 1 0 21 electrons pass through the device in that time frame.
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Account A is not feasible because Nathan's $300 is less than the minimum balance of $500 .
Account B has a $5 monthly fee.
Account C has $0 monthly fee with direct deposit, but $2 ATM fee per transaction.
Account D has $0 monthly fee with direct deposit and $0 ATM fees.
Therefore, Account D is the best option for Nathan. D
Explanation
Problem Analysis Nathan has $300 to open a checking account and wants the account with the lowest fees. He plans on using the ATM machine, and his employer offers direct deposit. We need to evaluate each bank account option based on these criteria.
Account A Evaluation Account A requires a minimum balance of $500 , which Nathan does not meet with his $300 . Therefore, Account A is not a feasible option.
Account B Evaluation Account B requires a minimum balance of $250 , which Nathan meets with his $300 . The ATM fees are $0 for ABC bank ATMs. The monthly fee is $5 . Since the problem does not specify whether Nathan will use ABC bank ATMs, we will assume he might use other ATMs as well. However, the monthly fee is fixed at $5 .
Account C Evaluation Account C requires a minimum balance of $50 , which Nathan meets with his $300 . The ATM fees are $2 per transaction. The monthly fee is $10 or $0 with direct deposit. Since Nathan has direct deposit, the monthly fee is $0 .
Account D Evaluation Account D requires a minimum balance of $100 , which Nathan meets with his $300 . The ATM fees are $0 per transaction. The monthly fee is $5 or $0 with direct deposit. Since Nathan has direct deposit, the monthly fee is $0 .
Comparison and Conclusion Now, let's compare the feasible options: Account B, Account C, and Account D. Account B has a monthly fee of $5 and may have ATM fees if Nathan uses non-ABC ATMs. Account C has $0 monthly fee and $2 per ATM transaction. Account D has $0 monthly fee and $0 ATM fees.
Since Nathan wants the lowest fees and Account D has no monthly fee and no ATM fees, Account D is the best option.
Examples
Choosing the right bank account is like selecting the best tool for a job. Just as a carpenter needs the right hammer, individuals need a bank account that fits their financial habits. By understanding minimum balance requirements, ATM fees, and monthly fees, you can make informed decisions that save you money. For instance, if you frequently use ATMs, an account with no ATM fees, like Account D, would be the most cost-effective choice, similar to how a carpenter would choose a durable hammer for frequent use.
