Answer:
$8.66 is rounded to $9
Explanation:
When rounding a number, you round to the nearest whole number.
If the last digit is 5 or higher (5,6,7,8,9,) it rounds up
If the last digit is 4 or lower (1,2,3,4) it rounds down
Example:
$7.60 would be rounded to $8 because 6 is higher than 5, or in this case, 60 is higher than 50
$4.40 would be rounded to $4 because 4 is lower than 5, or in this case, 40 is lower than 50