Final answer:
When rounding a decimal number to 1 decimal place, if the digit immediately after the decimal point is 5 or greater, you round up the previous digit. In this case, 60.5 is rounded up to 61 as the upper bound.
Step-by-step explanation:
To find the upper bound when rounding a decimal number to 1 decimal place, you need to consider the digit immediately after the decimal point. If this digit is 5 or greater, you round up the previous digit. If the digit is less than 5, you leave the previous digit as it is. In the case of rounding 60.5 to 1 decimal place, the digit immediately after the decimal point is 5, so you round up to the next whole number. Therefore, the upper bound is 61.