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Mathematics 14 Online
OpenStudy (anonymous):

How many days are between March 18, 2007 and January 9, 2008?

OpenStudy (anonymous):

From March 18 to January 9 is 13 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 + 9 = 297 days.

OpenStudy (anonymous):

HI this refers back to the previous question that I asked. Once I put it into an equation this is what I get $21,900 * .12 * 297/360. I get the answer of $2,168.10... Could you please explain how you got this answer please.

OpenStudy (anonymous):

That's 297/365 of a year so you'd do 21,900 x 0.12 x 297/365 to see

OpenStudy (anonymous):

But its asking for the ordinary interest which is 360 days.

OpenStudy (anonymous):

can you put all of the question up so i can see what it is.

OpenStudy (anonymous):

Joyce took out a loan for $21,900 at 12 percent on March 18, 2007, which will be due on January 9, 2008. Using ordinary interest, Joyce will pay back on Jan. 9 a total amount

OpenStudy (anonymous):

From March 18 to January 9 is 13 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 + 9 = 297 days. That's 297/365 of a year so you'd do 21,900 x 0.12 x 297/365 to see how much interest. Then add that to $21,900 to see what she'd pay back. (The formula is I = Prt where I = interest, P = principal (starting amount), r = rate as a decimal, and t = time in years.)

OpenStudy (anonymous):

Yeah but yet again its asking for the ordinary interest which is 360 days.

OpenStudy (anonymous):

so if its 360 days you would do 21,900 x 0.12 x 297/360 then add it to 21,900 to see what she paid back 297/360

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