Answer:
b
Explanation:
when firms enter into an industry, there are more firms competing for customers. This would shift the demand curve to the right as supply increases. An increase in supply would lead to a reduction in price.
If firms leave the industry, there would be a reduction in supply and price would increase
Answer:
Calculating volumes by water displacement is always more accurate than using mathematical formulas when the objects have irregular shapes or it is difficult to measure them exactly. The only thing that you must keep in mind is measuring the water displacements properly. One ml of water equals 1 cm³, so if the water level increased by 5 ml, then the object's volume is 5 cm³.
Answer:
b. social benefits will be greater than private benefits
Explanation:
Positive externalities can be defined as those that produce positive effects for society in relation to the consumption of a good or service.
This is because the social benefit is the sum of the private benefit plus the sum of the external benefit.
An example of positive externality pertinent to the present is the fact that vaccinating people generates greater positive effects on society, because when vaccinating an individual there is less chance of having more people infected with some disease.
So it is correct to say that the social benefits will be greater than the private ones. Letter b.
Answer:
a. 7,000 years
b. 2,333 years
c. 875 years
Explanation:
Based on rule of 70, we can have the following formula to do the calculation:
Number of years to double = 70 ÷ Interest rate per year .................... (1)
We can now calculate as follows:
a. A savings account earning 1% interest per year.
Number of years to double = 70 ÷ 1% = 7,000 years
b. A U.S. Treasury bond mutual fund earning 3% interest per year.
Number of years to double = 70 ÷ 3% = 2,333 years
c. A stock market mutual fund earning 8% interest per year.
Number of years to double = 70 ÷ 8% = 875 years
Note:
It can be observed that the higher the interest rate, the lower the number of years it will take the investment to double.
