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19.01.2020 •
Mathematics
Mona invests $1000 at 7% yearly interest. how much does she have to invest at 4% so that the total yearly interest from the two investments exceeds $138?
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Ответ:
more than $1700
Step-by-step explanation:
If P represents the amount invested at 4%, Mona's annual interest is ...
$1000×0.07 + P×0.04 > $138
P×0.04 > $68 . . . . . . subtract $70
P > $1700 . . . . . . . . . divide by the coefficient of P
Mona must invest more than $1700 at 4% to achieve total yearly interest of more than $138.
Ответ:
NOPE
Step-by-step explanation: