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### 5. \( \frac{1}{4} \times \frac{4}{11} = \)

To multiply fractions, multiply the numerators and then the denominators:
\[ \frac{1 \times 4}{4 \times 11} = \frac{4}{44} = \frac{1}{11} \]

None of the provided options match \( \frac{1}{11} \), so it appears there's an error in the options.

### 6. \( 3 = \text{berapa persennya } 20 \)

To find what percentage 3 is of 20:
\[ \frac{3}{20} \times 100\% = 15\% \]

So, the answer is:
e. 15

### 7. \( 4.036 \div 0.04 = \)

\[ 4.036 \div 0.04 = \frac{4.036}{0.04} = 100.9 \]

So, the answer is:
d. 100.9

### 8. Jika \( p = 2 \) dan \( q = 3 \) serta \( r = 3 \) berapakah \( pqr \)?

First, calculate \( r^2 + 2pq + q^2 \):
\[ r = 3 \]
\[ p = 2 \]
\[ q = 3 \]
\[ r^2 + 2pq + q^2 = 3^2 + 2(2)(3) + 3^2 = 9 + 12 + 9 = 30 \]

This result does not match the \( pqr \) form given in the options. Therefore, based on the calculation with the given p and q, the provided options might not be directly related to the straightforward product of p, q, and r without further context.

### 9. \( \sqrt{23^2 + 696} = \)

\[ 23^2 = 529 \]
\[ 529 + 696 = 1225 \]
\[ \sqrt{1225} = 35 \]

So, the answer is:
b. 35

### 10. \( 0.875 \div 1 \frac{1}{4} \)

Convert \( 1 \frac{1}{4} \) to an improper fraction:
\[ 1 \frac{1}{4} = \frac{5}{4} \]

Then,
\[ 0.875 \div \frac{5}{4} = 0.875 \times \frac{4}{5} = \frac{0.875 \times 4}{5} = \frac{3.5}{5} = 0.7 \]

So, the answer is:
b. 0.70

Would you like any more details on these problems? Feel free to ask any further questions. Here are some other questions you might be interested in:

1. How do you simplify fractions?
2. How do you convert a mixed number to an improper fraction?
3. How do you find the square root of a number?
4. How do you convert a decimal to a percentage?
5. How do you multiply and divide fractions?

**Tip:** Always double-check your calculations, especially when converting between different forms of numbers (e.g., fractions to decimals or mixed numbers).

Find detailed solutions to math problems involving fraction multiplication, percentage calculation, decimal division, algebraic expression evaluation, and square root calculation. Explore step-by-step solutions with clear explanations and formulas. Suitable for Grades 7-9.

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