1. **State the problem:** Simplify the expression
$$\frac{\sqrt[3]{-125} \times (1 - 0.8)^2 + 0.3}{(\frac{1}{5})^{-1} - \sqrt{2.25}}$$
2. **Recall formulas and rules:**
- Cube root: $\sqrt[3]{a}$ is the number that when cubed gives $a$.
- Powers and roots: $a^{-n} = \frac{1}{a^n}$.
- Square root: $\sqrt{a}$ is the number that when squared gives $a$.
- Order of operations: parentheses, exponents, multiplication/division, addition/subtraction.
3. **Calculate numerator:**
- $\sqrt[3]{-125} = -5$ because $(-5)^3 = -125$.
- $1 - 0.8 = 0.2$.
- $(0.2)^2 = 0.04$.
- Multiply: $-5 \times 0.04 = -0.2$.
- Add $0.3$: $-0.2 + 0.3 = 0.1$.
4. **Calculate denominator:**
- $(\frac{1}{5})^{-1} = 5$ because $a^{-1} = \frac{1}{a}$.
- $\sqrt{2.25} = 1.5$ because $1.5^2 = 2.25$.
- Subtract: $5 - 1.5 = 3.5$.
5. **Form the fraction:**
$$\frac{0.1}{3.5}$$
6. **Simplify the fraction:**
$$\frac{\cancel{0.1}}{\cancel{3.5}} = \frac{1}{35}$$
7. **Final answer:**
$$\frac{1}{35}$$
Real Numbers Expression 23C012
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