What is the meaning of the combining form shared by these terms: innate, antenatal, native?

Which of the following is an example of an implicit cost?  

You advise the owner of a local restaurant to lower the prices of his burgers. Which of the following is a consequence of this price change?

Sam has two options this weekend.  He could work at his job and earn $9/hour for three hours, or he could go to a show at the theater for that three hours.  A ticket to the theater costs $30. What is the opportunity cost of going to the theater?

In the long run, a firm in a perfectly competitive market earns (more than one answer may apply)

What best describes what’s been happening with the U.S. budget in the past 30 years?

You order a $20 sweatshirt online for a Father’s Day gift. The shipping charge is $10. You can get free shipping if your order totals $25 or more.  Consequently, you order a $5 bobble head doll, even though neither you nor your father really likes bobble head dolls. This is an example of

Suppose South Korea imports $4 billion in goods and services and exports $2.5 billion in goods and services. South Korea’s trade balance is ____________. This trade balance is called a ____________.

Suppose the price of a 75″ HD TV remains the same and the price of an iPhone decreases. What noticeable effect(s) occur(s)?

A competitive firm will shut down and produce output level Q = 0 if