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Mathematics 24 Online
OpenStudy (anonymous):

The future value of Gitta's certificate of deposit (CD), for the first five years, is represented by the sequence below. The applied interest is compound interest. $307.50, $315.00, $322.50, $330.00, $337.50, ... A. True B. False

OpenStudy (anonymous):

@SolomonZelman

OpenStudy (anonymous):

could you help me with this one too

OpenStudy (daniellelovee):

ugh your still on compound interest :( hold on @DanJS , can you help him?

OpenStudy (anonymous):

this is the final one.. after this i move to other stuff

OpenStudy (anonymous):

@Directrix could you help?

OpenStudy (daniellelovee):

thank God! lol

Directrix (directrix):

Is the interest compounded annually?

OpenStudy (danjs):

Compounded interest is exponential... Look at the change in the value for each increase in a year.. it is the same . the thing is linear with a slope of 7.5 dollars per year.

OpenStudy (danjs):

Compounding interest has a form\[y = A(x)^n\] This thing has the form \[y=m*x+b\]

Directrix (directrix):

$307.50, $315.00, $322.50, $330.00, $337.50, These terms differ by $7.50. Isn't this arithmetic? And, how could the interest be a flat $7.50 per year if the earned interested were reinvested into the account.

Directrix (directrix):

From @DanJS >> Compounded interest is exponential... Well, this is not.

OpenStudy (anonymous):

so it would be false then??? im a little confused.. :-/

Directrix (directrix):

If compounded is exponential and what you have is not, then, yes, false.

Directrix (directrix):

That is what @DanJS is circling in his post.

OpenStudy (anonymous):

The answer is False

Directrix (directrix):

That is what we thought. Good to know.

OpenStudy (danjs):

Bravo

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