Shelley delivered 12 newspapers after 20 minutes and 36 papers after 60 minutes what is the independent variable and the depende
nt variable and what is the rate of exchange
1 answer:
Answer:
The rate of exchange is 8%
Step-by-step explanation:
Given as :
Shelley delivered 12 newspaper after 20 min
And She delivered 36 papers after 60 min
Let the exchange rate = R %
So,
Final value = Initial value × ( 1 +
)
Or, 36 × 60 = 12 × 20 × ( 1 +
)
Or, 2160 = 240 × ( 1 +
)
Or,
= ( 1 +
)
Or, 9 = ( 1 +
)
∴
= 9 -1 = 8
Or , Rate = 8%
Hence The rate of exchange is 8% Answer
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