EXTRA CREDIT (2PTS.) Who is our favorite animal that teaches students across America safety procedures throughout the Cold War?

EXTRA CREDIT (3PTS.) Name at least FIVE of the conditions of surrender that Germany was held to after World War I that set the stage for further international economic unrest and eventually the rise of the Nazi Party.

A company spends $10,000 on advertising instead of upgrading its manufacturing equipment. The opportunity cost of the advertising is:

As consumer incomes increase after a recession, what happens to the demand for second-hand furniture, assuming it is an inferior good?

If Good A is a substitute for Good B, and Good C is a complement to Good B, what happens to the demand for Good C if the price of Good A decreases?

The principle of diminishing marginal utility states that:

If the price of jelly decreases, how will this impact the price and quantity of peanut butter, assuming peanut butter and jelly are complements?

The two longitudinal ridges on the medulla oblongata where many descending fibers cross over are called the 

In some cells, hyperpolarization occurs because  

The price of printers decreases by 20%. How is the market for printer ink cartridges likely to respond, assuming they are used together?