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Mathematics 23 Online
OpenStudy (anonymous):

Find the annual interest rate if a $7000 investment earns $840 annual simple interest in one year

OpenStudy (anonymous):

@Dobby1

OpenStudy (anonymous):

i think it would be 12%

OpenStudy (dobby1):

You might be able to find it bye doing the following step \[\frac{ 840 }{ 7000 }\]

OpenStudy (dobby1):

which equals .12 or 12%

OpenStudy (dobby1):

So you are correct :)

OpenStudy (anonymous):

ok and this Jack earned $972 in 6 years on an investment at a 3% simple interest rate. How much was Jack’s investment?

OpenStudy (dobby1):

yikes

OpenStudy (anonymous):

that's not a lot of money in 6 years. haha

OpenStudy (dobby1):

I would try dividing it by .18

OpenStudy (dobby1):

and i know that I am saying yikes ate the problem

OpenStudy (anonymous):

i think it would be $5400

OpenStudy (dobby1):

hm do you have multiple choice questions

OpenStudy (dobby1):

@manguitar

OpenStudy (anonymous):

yes here they are $174.96 $486 $1944 $5400

OpenStudy (dobby1):

Yeah i guess you are right

OpenStudy (dobby1):

I am having trouble with this one though after my first year of algebra my brain does not work as well with these kind of questions

OpenStudy (anonymous):

its all good thanks @Dobby1

OpenStudy (anonymous):

i'm out now. peace!

OpenStudy (dobby1):

yeah you are right you can find it by multiplying 5,400 by .18 because you got a 3% interest for 6 years and 5,400 * .18 = 972

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