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Mathematics 8 Online
OpenStudy (anonymous):

Katie invested $1200 at 8.5% interest. She earned $612 interest at the end of y years. What is the value of y? A. 18 B. 12 C. 6 D. 3

OpenStudy (anonymous):

Help please :)

OpenStudy (anonymous):

Giving fan and medal

pooja195 (pooja195):

\(\huge\color{pink}{WELCOME~TO~OPENSTUDY!!}\) To start with what formula are you using?

OpenStudy (anonymous):

proportion

pooja195 (pooja195):

Do you know it?

pooja195 (pooja195):

nterest = Principal times Rate times Time Or in symbols: I=Prt

pooja195 (pooja195):

\[612=1200(.085)t \]

OpenStudy (anonymous):

Ok

OpenStudy (anonymous):

I got

OpenStudy (anonymous):

0.1615

pooja195 (pooja195):

1. Multiply 1200 and .085 2. Divide both sides of the equation by that answer. 3. That is t try again

OpenStudy (anonymous):

Ok

OpenStudy (anonymous):

102

pooja195 (pooja195):

no.of years = 612/102

OpenStudy (anonymous):

6

pooja195 (pooja195):

Yes thats correct!!! good job! :D

OpenStudy (anonymous):

YAY

OpenStudy (anonymous):

I need help with 2 more questions

pooja195 (pooja195):

sure repost them on a seperate post :)

OpenStudy (anonymous):

Ok

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