`123.001xx28.999xx7.998=?`

Options

A. 45000
B. 30000
C. 28500
D. 40000

Explanation

To solve the problem \( 123.001 \times 28.999 \times 7.998 \) using approximation, we can follow these steps:

### Step 1: Identify the approximate values
- **Approximate \( 123.001 \)** to **\( 123 \)** (since it is very close to 123).
- **Approximate \( 28.999 \)** to **\( 29 \)** (since it is very close to 29).
- **Approximate \( 7.998 \)** to **\( 8 \)** (since it is very close to 8).

### Step 2: Rewrite the expression using approximate values
Now we can rewrite the expression using the approximate values:
\[ 123.001 \times 28.999 \times 7.998 \approx 123 \times 29 \times 8 \]

### Step 3: Calculate \( 123 \times 29 \)
First, we will calculate \( 123 \times 29 \):
\[ 123 \times 29 = 3567 \]

### Step 4: Calculate \( 3567 \times 8 \)
Next, we will multiply the result by 8:
\[ 3567 \times 8 = 28536 \]

### Final Result
Thus, the approximate value of \( 123.001 \times 28.999 \times 7.998 \) is:
\[ \approx 28536 \]