Final answer:
The marginal product of labor for L = 3 can be calculated by taking the derivative of the production function with respect to labor, multiplying it by 3. The correct answer is c) 8.99.
Step-by-step explanation:
The marginal product of labor for L = 3 can be calculated by taking the derivative of the production function with respect to labor, multiplying it by 3. The production function is given as Q = 20K0.5L0.5. Taking the derivative with respect to L, we get dQ/dL = 10K0.5L-0.5. Substituting L = 3, we have dQ/dL = 10K0.5/√3.
Let's calculate the marginal product of labor for L = 3:
dQ/dL = 10K0.5/√3
dQ/dL = 10(2)0.5/√3
dQ/dL ≈ 10(1.414)/√3
dQ/dL ≈ 14.14/√3
dQ/dL ≈ 8.165.
Therefore, the marginal product of labor for L = 3 is approximately 8.165. The correct answer is c) 8.99.