The answer is B Marginal cost is the money a producer pays for making one more unit, while marginal revenue is the money a producer earns from selling one more unit.
The total cost<span> of producing 101 units is $204. The average </span>cost<span> of producing 100 units is $2, or $200/100; however, the </span>marginal cost<span> for producing the 101st unit is $4, or ($204 - $200)/(101-100). The </span>marginal revenue<span> measures the change in the </span>revenue<span> that arises when one additional unit of a product is sold.</span>
The answer is D, Saudi Arabia was declared independent September 23, 1932. All of the others were independent before the fall, which occurred in about 1923.
