Katie invested $1200 at 8.5% interest. She earned $612 interest at the end of y years
Whats is the Value of y?
A. 18
B. 12
C. 6
D. 3
I will give medal and fan to best answer :)
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OpenStudy (mertsj):
What formula are you using?
OpenStudy (anonymous):
hey
OpenStudy (anonymous):
what do u mean exactly?
OpenStudy (anonymous):
The formula mul div sub
OpenStudy (mertsj):
There is a formula for calculating interest that you are now studying. What is it?
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OpenStudy (anonymous):
well for calculating 8.5% interest i times itbecause other than that i have no clue what your asking cause on the rest of my questions i have been using Price times rate time interest
OpenStudy (mertsj):
Interest = Principal times Rate times Time
Or in symbols:
I=Prt
OpenStudy (mertsj):
Plug in the numbers you are given and solve for t
OpenStudy (anonymous):
yea thats what i was using but it was still not a answer that i was givin but i'll try again
OpenStudy (mertsj):
\[612=1200(.085)t\]
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OpenStudy (anonymous):
1200×8.5100
which is
102
then
102 x no.of years = 612
no.of years = 612/102
= 6 years
OpenStudy (mertsj):
1. Multiply 1200 and .085
2. Divide both sides of the equation by that answer.
3. That is t