In this scenario, Dr. Powell is most likely a professional in the field of<u> "clinical psychology".</u>
Everybody has off days when they simply don't feel like themselves. For the dominant part of individuals, these sentiments are typical, and they don't keep going long by any means. For a few, be that as it may, these sentiments are more genuine, and they could show a psychological or enthusiastic issue.
Clinical psychology refers to a branch of psychology that spotlights on diagnosing and treating mental, passionate, and social issue. A portion of the more typical issue that may be dealt with incorporate learning incapacities, substance mishandle, despondency, nervousness, and dietary issues.
The marginal cost is how much it costs to produce one item more. It cost 0$ to produce 0 bikes but if you make one, then it costs 80$. Hence the marginal cost for the first bike is 80$. For the fourth bike, we have that the 3 bikes cost 110$ and the 4 bikes cost 130$. Hence it costs 20$ dollars to produce one more bike (from 3rd to 4th) and hence the marginal cost is 20$. Similarly for the 6th bike, we compare the cost of producing 5 bikes to the cost of producing 6 bikes and we get that the marginal cost is 50$. Applying the same methodology, the marginal cost for the 7th bike is 60$.
The answer is C) The British and the Spanish fought the Americans for control of Florida.