Answer:
4.21
Explanation:
The hundredths place is the second number after the decimal. when rounding, you want to look at the number after. In this case the number after 1 is 0 which is lower than 5. Since it's lower than 5 we will keep the number the same.
Say the number after 1 was 7. Then we would round up and make the 1 into a 2. Any number above 5 you round up and add one to the number. If the number after is below 5, the number doesn't change.
Hope that made sense! :)