Answer:
100
Explanation:
We have the number 91 and are asked to round to the nearest 100.
When we round to a certain number, we always have to look at the number to the right of the place value being rounded to, if the numbers is 0-4, you will round down, if the number is 5-9, you round up.
Right now we have 094, 0 being the hundreds place, look to the right and see that we have 9. Therefore we round up.
100