KekePonds1021
24.03.2020 •
Mathematics
A principal of 1500 is invested at 8.25 interest, compounded annually. How many years will it take to accumulate 3000 or more in the account? help please
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Ответ:
d = v * 4 + 5 * ( v + 4 )
191 = 4 v + 5 v + 20
9 v = 191 - 20
9 v = 171
v = 171 : 9
v = 19 mph ( the speed heading south )
Therefore the speed heading west: v + 4 = 19 + 4 = 23 mph
The ship was traveling west at 23 miles per hour.