Let's go through the questions from the image you uploaded:

Question 1:

(a) Calculate $\frac{12.6^2 - 4}{\sqrt{25} - 3}$

This is a calculation problem where we are asked to evaluate the given expression step by step: $\frac{12.6^2 - 4}{\sqrt{25} - 3}$

Steps:

1. $12.6^2 = 158.76$
2. $\sqrt{25} = 5$
3. Subtract the values:
   • Numerator: $158.76 - 4 = 154.76$
   • Denominator: $5 - 3 = 2$
4. Finally, $\frac{154.76}{2} = 77.38$

The first five digits are 77.380.

(b) Write the answer to part (a) correct to two decimal places: Answer is 77.38.

Question 2:

Express 32% as: (a) Fraction:

• 32% means $\frac{32}{100}$, which simplifies to $\frac{8}{25}$.

(b) Decimal:

• 32% is the same as 0.32.

Question 3:

(a) Round off 35.492 to the nearest whole number:

• The nearest whole number is 35.

Do you want more details or explanations on any of these?

Here are 5 related questions for further practice:

1. What is $\frac{18.5^2 - 5}{\sqrt{49} - 4}$?
2. How do you express 45% as a fraction?
3. Round off 42.865 to two decimal places.
4. Express 58% as a decimal.
5. What is the square root of 144?

Tip: When simplifying fractions, always look for the greatest common divisor to reduce them to their simplest form!