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14.07.2019 •
Mathematics
Show how you got your answer or explain it interest earned: $84 principal: $600 interest rate 7% time: ?
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Ответ:
Total = Principal × ( 1 + Rate ) ^ years
(Solved by taking logarithms)
Years = log (total / principal) / (log (1 + rate))
Years = log (684 / 600) / (log 1.07)
Years = log (1.14) / (log (1.07)
Years = 0.0569048513364726 / 0.0293837776852097
Years = 1.9366077414
Ответ:
For simple interest, the amount of interest (I) is calculated from the principal (P), the annual rate (r) and the number of years (t) using the formula
... I = P·r·t
Fill in the given numbers, and solve for t.
... 84 = 600·0.07·t . . . of course, you know that 7% = 7/100 = 0.07
... 84 = 42t . . . . . . . . simplify
... 84/42 = t = 2 . . . . divide by the coefficient of t
The time period is 2 years.
Ответ:
14 dollars.
Step-by-step explanation:
With annual interest rate, 5.25 interest rate is $14.00