10, because 5 is generally rounded up not down.
5.1
5.04
5 is an integer and so already rounded to a tenth.
5.0
855.8
5.0
8465.0
It is: 21498.3 rounded to the tenth place
2.1
It is 29.3 when rounded to the nearest tenth
453.0
.45 can be rounded to the nearest tenth, .5 or one half.