Percentage of interest at which the money is invested = 5%
Time for which the money is invested = 3 years
The final amount after 3 years = $820
Let us assume the principal amount = x dollars
Then
820 = x (1 + 0.5)^3
820 = x(1.05)^3
x = 820/(1.05)^3
= 708.35 dollars
From the above deduction, we can conclude that the principal amount invested was $708.35.
I’m just answering so it lets me ask mother question
Answer:
c. more than $78.02 billion in exports
Explanation:
The nation of Brazil had imports of $78.02 billion in 2018 and had a positive trade balance. This means that Brazil has exports of greater than $78.02 billion. That if a country's exports go beyond its imports, it is claimed that the country has a positive balance of trade. It indicates that Brazil has exports of greater than $78.02 billion.
Hence, the correct option is c.
Answer:
Efficiency requires that one lighthouse is built since the willingness to pay of all the residents together is larger than the cost of providing the lighthouse
Explanation:
Since the lighthouse is a public good, according to the coase theorem, if the combined willingness to pay for the lighthouse of all of the people living on the islands is higher than the cost of the lighthouse, then a lighthouse should be built.
The total willingness to pay is:
The population willingness to pay is higher than the cost of building one lighthouse ($2000) but lower than the cost of building two lighthouses ($4000). Therefore, efficiency requires that one lighthouse is built since the willingness to pay of all the residents together is larger than the cost of providing the lighthouse.