Final answer:
The bank will send a notice to Mr. Gomez when the amount in his checking account is less than 20 percent. Based on the provided options and context, the correct answer is (a) 18, as it is the amount specified to be below the 20 percent threshold.
Step-by-step explanation:
The student is asking which amount will trigger a notice from the bank to Mr. Gomez when the amount in his checking account drops below a certain threshold. According to the given options, we are to look for a threshold that is less than 20 percent. Using the reference information provided, the correct answer is represented by option (d) which indicates a scenario where the bank should send a notice for an amount less than 20 percent, when, in fact, it is less than 20 percent.
So, if we are to advise Mr. Gomez about the minimum amount that will require the bank to send him a notice, we would tell him it is any amount falling below 20% of the total money in his account. Without additional context, it's challenging to assign a precise monetary value, as 'less than 20 percent' is relative to the overall amount in the account. However, from the options provided to Mr. Gomez (a) 18, (b) 25, (c) 20, (d) 21, the correct answer would be (a) 18, which is the amount below the 20 percent threshold.