Each quarter, you are going to make Interest rate/number of periods per year on your investment. Since you have an interest rate of 8% and four periods per year, each quarter you make 2% on your principal.
Thus, the formula for determining the value of your investment after ONE quarter is Principal * 102% or P*1.02.
Each time you accrue interest, your investment grows by a further 2%, so the formula for the value of your investment over x quarters is P*(1.02^x) (the carrot "^" is a common computer symbol denoting an exponent).
Since you are interested in 8 years and you have 4 quarters per year, you will have 32 compounding periods and a final formula of P*(1.02^32).
Since you don't know P, but do know the final value of $2000, you must solve the following equation for P.
P*(1.02^32)=2000
To do this, simply divide both sides by 1.02^32. This gives you the value of your initial principal:
P = 2000/(1.02^32)
4795.65 (approx).
Type your answer here... $8,324.59
630/(1.1)3 = 630/1.331 = 473.33
Before she chooses a bank and deposits her money, Mary should shop around first.There are different kinds of interest.At 3.2% . . .If it's simple interest, her money will earn $ 8.80 .If it's compounded quarterly, it earns $ 8.91 in one year.If it's compounded monthly, it earns $ 8.93 .If it's compounded daily, it earns $ 8.94 .Also, by the way, notice that Mary doesn't earn the interest. Her invested money does.
(1 + .07/4)4x = 3 4x log(1+.07/4) = log(3) x = 0.25 log(3)/log(1.0175) = 15.83 The amount of the original investment doesn't matter. At 7% compounded quarterly, the value passes triple the original amount with the interest payment at the end of the 16th year.
4795.65 (approx).
It will take 19 years.
Type your answer here... $8,324.59
You would need 9687 dollars.
630/(1.1)3 = 630/1.331 = 473.33
Quarterly compounding means 1/4 of the annual interest rate is paid 4 times a year.In 6 years, you get 2.5 percent 24 times.(1.025)24 = 1.80873 (rounded)Your $12,000 has then grown to (12,000 x 1.80873) = $21,704.71 .Can I send you some money to add to the account for me ?
Before she chooses a bank and deposits her money, Mary should shop around first.There are different kinds of interest.At 3.2% . . .If it's simple interest, her money will earn $ 8.80 .If it's compounded quarterly, it earns $ 8.91 in one year.If it's compounded monthly, it earns $ 8.93 .If it's compounded daily, it earns $ 8.94 .Also, by the way, notice that Mary doesn't earn the interest. Her invested money does.
(1 + .07/4)4x = 3 4x log(1+.07/4) = log(3) x = 0.25 log(3)/log(1.0175) = 15.83 The amount of the original investment doesn't matter. At 7% compounded quarterly, the value passes triple the original amount with the interest payment at the end of the 16th year.
y = ln(3)/ln(1.0575) = 19.65 years, approx.
I haven't gotten the answer to that test question either....the choices seem wrong
708.35 will yield 820.004 = 820.00 The annual growth rate is eln(1.05) - 1 or 10log(1.05) - 1
It would earn more if interest were compounded quarterly but any lender will adjust the quarterly rate so that you get the same! For example, a 5% annual rate is equivalent to a rate of 4.9089% per quarter. This is one reason that some countries require the publication of Annual Equivalent Rates to enable investors to compare such differences.