Place Value Problem: Converting 9 Tens to Standard Form

To solve this problem, we need to translate the term "9 tens" into a numeric value. Each "ten" represents a group of 10 units. Therefore, the phrase "9 tens" translates into:

$9 \times 10 = 90$

Thus, the number in question is 90. Now, let's examine the given answer choices:

1. The choice $9$ does not represent "9 tens," as it is a single digit and not a multiple of 10.

2. The choice $90$ represents the number with "9 tens," as our calculation showed.

3. The choice $95$ also is made up of "9 tens" when decomposed as $90 + 5$. This still fits the criteria.

4. The fourth choice states “Answers (b) and (c) are correct,” which is true based on our exploration.

Therefore, the correct answer to this problem is that both answers (b) and (c) satisfy the problem's condition of having "9 tens."

Therefore, the correct choice is "Answers (b) and (c) are correct."