Answer:
8.5
Explanation:
Where is the tenths place in a decimal?
If you look at a decimal (0.00) there is the tenths, (0.00), hundredths (0.00), and so on.
What does it mean to round?
Rounding to the nearest tenth, would mean first looking at the hundredths place (8.45), and if it is greater or equal to 5, which if it is, you round up, but if it isn't, you round down.
Therefore, 8.45 rounded to the nearest tenth is 8.5.