Subjects algebra

Evaluate Expression C1D7B8

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Question: Evaluate the numerical value of the expression without using a calculator: $$(-4)^{-2} \times 2^{5}$$
1. **State the problem:** We need to evaluate the expression $$(-4)^{-2} \times 2^{5}$$ without using a calculator. 2. **Recall the rules:** - A negative exponent means taking the reciprocal: $$a^{-n} = \frac{1}{a^{n}}$$. - Powers of numbers can be simplified by multiplying the bases if they are the same. 3. **Rewrite the expression using the negative exponent rule:** $$(-4)^{-2} = \frac{1}{(-4)^{2}}$$ 4. **Calculate $$(-4)^2$$:** $$(-4)^2 = (-4) \times (-4) = 16$$ 5. **Substitute back:** $$(-4)^{-2} = \frac{1}{16}$$ 6. **Calculate $$2^5$$:** $$2^5 = 2 \times 2 \times 2 \times 2 \times 2 = 32$$ 7. **Multiply the two results:** $$\frac{1}{16} \times 32 = \frac{32}{16}$$ 8. **Simplify the fraction:** $$\frac{32}{16} = \cancel{\frac{32}{16}} = 2$$ **Final answer:** $$2$$