Answer:
13 years
Explanation:
Note that, if we add the annual interest rate of 7.9% to $8000 [(0.079*8000)+8000] we get a total value of $8632. We perform random division of the 8632 with 11 12, 13 years we note that at 13 years the total annual payment is lowest.
Such that 8632/13 years= $664 lower than paying $750.
is a person who benefits from something without expending effort or paying for it.
Answer:
r = 9.86%
Explanation:
The formula for calculating the future value of an invested amount yielding a compound interest is given by:

where:
FV = future value = $16,000
PV = present value = $10,000
r = interest rate = ?
n = number of compounding period per year = 1
t = time in years = 5
∴ 
dividing both sides by 10,000


to remove the power of 5, we have to take the 5th root of both sides:

Using your calculator:
1.09856 = 1 + r
∴ r = 1.09856 - 1 = 0.09856
r = 0.0986 = 9.86%
∴ r = 9.86%