1. The problem is to compute the resistance value of a resistor with color bands Green, Black, Yellow, and Silver using the resistor color code formula. 2. The resistor color code formula is: $$R = (AB) \times 10^C \pm \text{tolerance}$$ where: - $A$ is the first digit (color of the first band), - $B$ is the second digit (color of the second band), - $C$ is the multiplier (color of the third band), - tolerance is given by the fourth band. 3. According to the color code: - Green corresponds to 5, - Black corresponds to 0, - Yellow corresponds to multiplier $10^4$, - Silver corresponds to tolerance $\pm 10\%$. 4. Substitute the values: $$R = (5 0) \times 10^4 = 50 \times 10^4 = 500000\ \Omega$$ 5. The tolerance is $\pm 10\%$, so the resistance value is: $$500000\ \Omega \pm 10\%$$ 6. This means the resistor's resistance is $500000$ ohms with a tolerance of $\pm 10\%$. Final answer: $500000\ \Omega \pm 10\%$