Question 1166790
this looks like a simple interest equation.


that equation is:


A = p + i.


A is the total value of the investment at the end of the investment period.
p is the principal, which is the value of the investment at the beginning of the investment period.
i is the interest that was earned on the principal during the investment period.


the value of i has its own equation, which is:


i = p * r * t


i is the interest earned on the investment during the investment period.
p is the principal which is the investment at the beginning of the investment period.
r is the interest rate per time period.
t is the number of time periods.


for example:


you are given that:


the initial investment is 1000 dollars.
the interest rate is 5% per year.
the number of years invested is 15 years.


you are asked to find the value of the investment at the end of the investment period.


the formula is A = p + i


since i = p * r * t, then:


i = 1000 * .05 * 15 = 750


A = p + i becomes A = 1000 + 750 = 1750


to find i, you had to use the i formula.


note that the rate was used and not the percent rate.
rate = percent rate / 100.