Answer: the two numbers that round to the nearest tenth are 15.0 and 15.6.
Step-by-step explanation:
To round each of these numbers to the nearest tenth, we look at the first digit after the decimal point:
15.04 rounds to 15.0 (nearest tenth)
15.55 rounds to 15.6 (nearest tenth)
15.508 rounds to 15.5 (nearest tenth)
15.0 remains 15.0 (already rounded to the nearest tenth)
15.49 rounds to 15.5 (nearest tenth)