Interest on $5,255 at 12% for 30 days (use ordinary interest) is
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OpenStudy (anonymous):
do you remember the forumla
OpenStudy (anonymous):
i=prt?
OpenStudy (anonymous):
Yes
OpenStudy (anonymous):
I = (P)(r)(T)
OpenStudy (anonymous):
do you know which value is which?
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OpenStudy (anonymous):
principle is 5255?
rate= 12%
time = 30 days
?
OpenStudy (anonymous):
correct but remember you cant use % so .12, but alta T is meaasured in years
so what is 1 month out of a year
OpenStudy (anonymous):
so 1/12 ? X.12 ?
OpenStudy (anonymous):
(5255)(.12)(1/12) prt
OpenStudy (anonymous):
THANK YOU !
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OpenStudy (anonymous):
what if it would have been 50 days instead of 30?
OpenStudy (anonymous):
1.6/12 i beleive since 20/30(a month) is 60%
OpenStudy (futureboy1):
630.60
OpenStudy (anonymous):
where did you get 630.60?
OpenStudy (anonymous):
? so confused lol =(
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OpenStudy (futureboy1):
thats how much you will have to pay
OpenStudy (anonymous):
you cant just give answers..
what formula did you use
OpenStudy (futureboy1):
5255*0.12*1=
OpenStudy (futureboy1):
P is the principal amount, $5255.00.
r is the interest rate, 12% per month, or in decimal form, 12/100=0.12.
So, t is 1....month time periods.
To find the simple interest, we multiply 5255 × 0.12 × 1 to get that:
The interest is: $630.60
OpenStudy (anonymous):
no he needs 50 days
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OpenStudy (futureboy1):
oh hold on
OpenStudy (anonymous):
1 month and .60 of a month
OpenStudy (anonymous):
over 12
OpenStudy (futureboy1):
1008.96
OpenStudy (futureboy1):
@lugerm
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OpenStudy (solomonzelman):
5,255 is the entire amount/investment (or 100% of it).
When you add 12% of the sum, you are really taking 12/100th of the sum. So, 12% of that would be; 5,255×12÷100 (which is =630.6). And that is daily interest once, but for 30 days, that would be 30×630.6
OpenStudy (solomonzelman):
THis is on an assumption that 12% is a daily interest, with a length of interest charge period of 30 days.