Micro Economics Help

I recently took an online quiz and failed bad and need some help I dont understand where I am going wrong.

Explicit costs are:
Select one:
a. always greater than implicit costs.
b. never greater than implicit costs.
c. always paid out of pocket.
d. the opportunity cost of the means of production.
e. what a business sacrifices in order to produce a good.
Another term for factors of production is:
Select one:
a. costs.
b. revenues.
c. outputs.
d. profits.
e. inputs.
If workers are UNABLE to specialize and become more productive as more labor is hired, the amount of total output produced:
Select one:
a. increases at a constant rate.
b. decreases at an increasing rate.
c. decreases at a constant rate.
d. increases at an increasing rate.
e. increases at a decreasing rate.
Darrell owns a furniture store. His total costs are $225,000 per year, and his fixed costs are $150,000 per year. This means that his variable costs are:
Select one:
a. $50,000.
b. $375,000.
c. $150,000.
d. $75,000.
e. $225,000.

If a firm experiences productivity gains from employee specialization, its marginal cost will:
Select one:
a. decrease at an decreasing rate.
b. decrease at a constant rate.
c. decrease at a increasing rate.
d. increase at an increasing rate.
e. increase at a decreasing rate.

In the short run, the cost of ________ is variable whereas the cost of ________ is fixed.
Select one:
a. electricity; wages
b. capital; labor
c. labor; capital
d. capital; raw materials
e. raw materials; labor
Lauren owns a bakery. If she decided to expand the size of her bakery so that she could bake more bread, how would she know if she is experiencing constant returns to scale?
Select one:
a. Her long-run total cost of baking remains unchanged.
b. Her long-run average cost of baking each loaf of bread decreases.
c. Her long-run average cost of baking each loaf of bread increases.
d. Her long-run total cost of baking bread decreases.
e. Her long-run average cost of baking each loaf of bread remains unchanged.
If a firm adds multiple layers of management as it increases its scale of production, thus adding to its costs, we would expect its long-run average cost curve to be:
Select one:
a. horizontal.
b. upward sloping.
c. vertical.
d. U shaped.
e. downward sloping.






Which of the following is true about explicit costs?
a. Explicit costs are the opportunity costs of production.
b. Explicit costs are not included when measuring economic profit.
c. Explicit costs are not included when measuring accounting profit.
d. Explicit costs are not measured in terms of dollars.
e. Explicit costs are out-of-pocket expenses.

In economics, we assume that firms make decisions in order to:
a. evade taxes.
b. minimize revenues.
c. maximize profit.
d. protect the environment.
e. lobby officials.

If the marginal product of labor for a firm decreases as more workers are hired, we know that:
a. the marginal cost of producing output is constant.
b. the gains from specialization are exhausted.
c. all workers are paid the same wage.
d. there are still gains from specialization left to be exploited.
e. the marginal cost of producing output is decreasing.

If all workers are able to specialize and become more productive as more labor is hired, the amount of total output produced:
a. decreases at a constant rate.
b. increases at an increasing rate.
c. increases at a constant rate.
d. decreases at an increasing rate.
e. increases at a decreasing rate.


Lauren owns a bakery. Her total costs are $150,000 per year, and her variable costs are $85,000. This means that her fixed costs are:
Select one:
a. $85,000.
b. $70,000.
c. $150,000.
d. $235,000.
e. $65,000.

The full set of short-run cost curves for a firm tells us:
a. what is the cost-minimizing level of output.
b. how many other firms are competing with that firm.
c. whether the firm will experience economies of scale.
d. how many employees the firm has hired.
e. what is the profit-maximizing level of output.

If a firm experiences diseconomies of scale, its long-run average cost curve will be:
a. upward sloping.
b. U shaped.
c. a horizontal line.
d. downward sloping.
e. a vertical line.

If a firm experiences some gains from specialization as it expands its scale of production, and adds additional layers of management as it does so assuming they have the same effect, we would expect its long-run average total cost curve to be:
a. horizontal.
b. vertical.
c. upward sloping.
d. downward sloping.
e. U shaped.