so you round to the second decimal place, giving you 43.59
the answer is 43.59 because the 6 is bigger than four and so then that would add on to the .58 to a .59
When rounding 43.586 to the nearest hundredth, you look at the digit in the thousandths place. Since it is greater than 5, you round the hundredths place up from 8 to 9, resulting in 43.59.
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