# Economics questions

## Description

1. A firm produces an output y using labor and capital, whose quantities are
denoted respectively by xL and xK. Suppose this firms production function is given by f(L,K)=50v(KL)+K+L.

a. Derive the marginal product of labor and the marginal product of cap-
ital.

b. Is the marginal product of labor diminishing everywhere? Does it ever
take negative values?

c. Does the production process of this firm exhibit increasing, constant,
or decreasing returns to scale?

2. Let B denote the number of bicycles produced from xF units of bicycle frames
and xT units of tires. Suppose that every bicycle needs exactly two tires and
one frame. Draw an isoquant that represents this production process and
write down a possible production function for bicycles.

3. Suppose a firms production function is given by f(x1, x2) = 6vx1 + 8vx2.
Let w1=\$1 be the price of input 1 and let w2 =\$4 be the price of input
2. The price of the firms output, which the firm takes as given, is p = \$8.
Calculate the profit-maximizing quantity of output.

4. Suppose a firms production function is given by f(x1,x2) = vx1x2. Let
w1 = \$10 and w2 = \$15. If the firms goal is to maximize profits, in what
proportions should it use the inputs 1 and 2?