Find the approximate value of (?) in the following questions.
`?% "of" {(26.03)^(2) - 19.023 xx 3.99} = 1818.014`

Options

A. 311
B. 315
C. 332
D. 303

Answer

To find the approximate value of the question mark (?) in the equation:

\[ ?\% \text{ of } \{(26.03)^2 - 19.023 \times 3.99\} = 1818.014 \]

we will follow these steps:

### Step 1: Approximate the values
We will approximate the numbers involved in the equation:
- \( 26.03 \approx 26 \)
- \( 19.023 \approx 19 \)
- \( 3.99 \approx 4 \)
- \( 1818.014 \approx 1818 \)

So, we rewrite the equation as:

\[ ?\% \text{ of } \{(26)^2 - (19 \times 4)\} = 1818 \]

### Step 2: Calculate \( (26)^2 \)
Now, calculate \( (26)^2 \):

\[ (26)^2 = 676 \]

### Step 3: Calculate \( 19 \times 4 \)
Next, calculate \( 19 \times 4 \):

\[ 19 \times 4 = 76 \]

### Step 4: Substitute and simplify
Now substitute these values back into the equation:

\[ ?\% \text{ of } \{676 - 76\} = 1818 \]

Calculate \( 676 - 76 \):

\[ 676 - 76 = 600 \]

So now we have:

\[ ?\% \text{ of } 600 = 1818 \]

### Step 5: Convert percentage to fraction
Convert the percentage into a fraction:

\[ \frac{?}{100} \times 600 = 1818 \]

### Step 6: Solve for ?
To isolate ?, we can multiply both sides by \( 100 \):

\[ ? \times 600 = 181800 \]

Now, divide both sides by 600:

\[ ? = \frac{181800}{600} \]

### Step 7: Calculate the value
Now perform the division:

\[ ? = 303 \]

### Conclusion
Thus, the approximate value of ? is:

\[ \boxed{303} \]