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Mathematics 10 Online
OpenStudy (anonymous):

$800 at 5 1/2 annual interest, compounded semiannually, for 7 years

OpenStudy (anonymous):

Use the compound interest formula to find the value of the investment.

OpenStudy (anonymous):

somebody helpppppppp

OpenStudy (jdoe0001):

so use it then \(\bf b = balance\\ p = principal\\ r = rate\\ n = periods\\ t = years\\ \quad \\ \quad \\ b = p\left(1+\cfrac{r}{n}\right)^{nt}\)

OpenStudy (anonymous):

i dont get it

OpenStudy (jdoe0001):

semi-annually compounded, that means semi = half, annual, a year, half a year, you can only have 2 halves, so, 2 so the period per year is 2

OpenStudy (jdoe0001):

your principal, is the original deposit, $800 period is 2, twice a year rate is 5 and 1/2, or 5.5 in decimal format will be 0.055 years, well, 7

OpenStudy (jdoe0001):

plug them all in, to get your balance

OpenStudy (anonymous):

would it be 1,169.60?

OpenStudy (jdoe0001):

is that what you got?

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

$10,008.00 c. $14,800.75 b. $14,802.44 d. $1,169.60

OpenStudy (jdoe0001):

yeap, I got the same :)

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