標題:
Mathematics (With steps)
發問:
Jack borrows $1000. He only got $900, and he has to repay $1300 in two weeks. If no money is repaid after two weeks. $1300 will be taken as the interest will be calcuted at the same interest rate. (Assuming there are 52 weeks in a year)a) Find the yearly interest rate for the first two weeks.b) If no money is... 顯示更多 Jack borrows $1000. He only got $900, and he has to repay $1300 in two weeks. If no money is repaid after two weeks. $1300 will be taken as the interest will be calcuted at the same interest rate. (Assuming there are 52 weeks in a year) a) Find the yearly interest rate for the first two weeks. b) If no money is repaid for the first 2 weeks, find the total interest after the first 4 weeks.
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最佳解答:
a. principal * rate = interest rate = 400 / 900 = 44.44% (per 2 weeks) yearly interest rate = 44.44% * 26 = 1155.56% b. total interest for the first 2 weeks = $400 total interest for the next 2 weeks = 1300 * 44.44% = $577.72 therefore total interest = 400 + 577.72 = $977.72 這說明了我們不要隨便借「九出十三歸」的大耳濃
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