Assume the appropriate discount rate is 2% per period. The discount factor for a cash flow 10 periods from today is closest to:

0.8203

Explanation:

Given that :

Using the discount factor formula :

1 / (1 + r)^n

r = discount rate = 2% = 0.02

n = number of periods = 10

1 / (1 + 0.02)^10

1 / (1.02)^10

1 / 1.21899441999475713024

= 0.8203482

= 0.8203

start by isolating the variable on one side by adding 43w^2 to both sides.   the equation will read:

25w^2+5=0

*subtract 5 from both sides*

25w^2=-5

*divide both sides by 25*

w^2=-1/5

*take the square root of both sides*

w=√(-1/5)

the square root of -1 is i.   the square root of 5 remains √5

the answer is i/√5.

hope this