Answer:
56.5
Explanation:
Since you are rounding to the tenths place, you look at the number to the right of it, aka the thousandths place.
If the number in the thousandth place is 5 or greater than the number in the tenths place becomes a number higher, or If the number in the thousandth place is 4 or less, than you keep the number in the tenths place the same.
Since the 6 is greater than 4, the 4 in the tenths place becomes a 5