Is this how I would do this problem?

What is the percent increase in the population for all six inhabited continents,
excluding Asia, from 1950 to 2000?
Add all of the 1950 populations together, add all the 2000 populations together, subtract years total for 2000 from 1950
OR
would I get the difference of each country in 200 from 1950 and then add all the totals together and divide by 6?

Well you are excluding Asia. So you add all 5 from 1950 and subtract it from all 5 in 2000. That number is the increase for those 5 continents. So now you need to see what % this increase is. To do this you take your 1950 figure and divide it into the increase. Now move the decomal 2 places to the right and it is percent.

Sort of like this:
5 grows to
8
increase is 3
so 3/5=0.60 or 60%

Unless i did something wrong with my decimal it would be 207%?

Calculate the componentof debt,preferred, and equity, and calculate the WACC
Debt: bond interest expense: 12% Tax rate: 36%
Perferred dividend:$4.50 preferred stock price:$50
Equity: common dividend $2.50 common stock price $40 div. growth rate 5%
risk free rt=3% expected rtn 13% beta 0.8

To calculate the Weighted Average Cost of Capital (WACC), you need to determine the percentage composition of debt, preferred stock, and equity in the company's capital structure.

1. Debt:
Calculate the after-tax cost of debt by multiplying the bond interest expense by (1 - tax rate). In this case, it would be 12% * (1 - 0.36) = 7.68%.

2. Preferred Stock:
Calculate the cost of preferred stock by dividing the preferred dividend by the preferred stock price. In this case, it would be $4.50 / $50 = 9%.

3. Equity:
Calculate the cost of equity using the Capital Asset Pricing Model (CAPM). The CAPM formula is: Cost of Equity = Risk-Free Rate + Beta * (Expected Return - Risk-Free Rate)

a. Risk-Free Rate is given as 3%.
b. Beta is given as 0.8.
c. Expected Return is given as 13%.

Using the formula, the Cost of Equity would be 3% + 0.8 * (13% - 3%) = 10%.

Now that you have the individual costs for debt, preferred stock, and equity, you can calculate the WACC by multiplying each cost by its respective weight in the company's capital structure and summing them up.

Assuming the weights are not provided, you typically assign weights based on the market value of each component. Let's assume the weights are as follows:
Debt: 40%
Preferred Stock: 10%
Equity: 50%

To calculate the WACC:
WACC = (Weight of Debt * Cost of Debt) + (Weight of Preferred Stock * Cost of Preferred Stock) + (Weight of Equity * Cost of Equity)
WACC = (0.4 * 7.68%) + (0.1 * 9%) + (0.5 * 10%)

After plugging in the values, you can calculate the WACC.