What approximate value should come in place of the question mark (?) in the following questions?
(Note: You are not expected to calculate the exact value.)
`23.001xx18.999xx7.998=?`

Options

A. 4200
B. 3000
C. 3500
D. 4000

Answer

To solve the problem of finding the approximate value of \( 23.001 \times 18.999 \times 7.998 \), we can follow these steps:

### Step 1: Approximate each number
- The first number is \( 23.001 \). We can approximate this to \( 23 \).
- The second number is \( 18.999 \). We can approximate this to \( 19 \).
- The third number is \( 7.998 \). We can approximate this to \( 8 \).

### Step 2: Multiply the approximated values
Now, we will multiply the approximated values together:
\[ 23 \times 19 \times 8 \]

### Step 3: Calculate \( 23 \times 19 \)
First, let's calculate \( 23 \times 19 \):
\[ 23 \times 19 = 437 \]

### Step 4: Multiply the result by \( 8 \)
Next, we multiply \( 437 \) by \( 8 \):
\[ 437 \times 8 = 3496 \]

### Step 5: Round the result
Since we are looking for an approximate value, we can round \( 3496 \) to the nearest hundred, which gives us \( 3500 \).

### Final Answer
Thus, the approximate value that should come in place of the question mark (?) is:
\[ \boxed{3500} \]