Answer:
18 tala
Explanation:
The exchange is proportional, so the number of tala Ming receives will be proportional to the number of dollars she exchanges.
x / ($6) = 6 tala / ($2)
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Multiplying by $6, we have ...
x = (6 tala)($6/$2) = 18 tala
Ming would get 18 tala when exchanging $6.