Final answer:
Tim is thinking of a number that rounds to 50, and among the provided options, 60 is the correct answer because it's the only number that would round down to 50.
Step-by-step explanation:
The question asks us to identify the whole number that, when rounded to the nearest 10, would be 50. To round a number to the nearest 10, we look at the ones digit. If it is 5 or greater, we round up to the next tens digit. If it's less than 5, we round down, staying at the current tens digit. Since we are looking for a number that rounds up to 50, it must be a number where the tens digit is 5 and the ones digit ranges from 0 to 4. Among the options provided, 60 is the only number that would round down to 50 because 60's ones digit is 0, which is less than 5. Therefore, the answer is C) 60.