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3 years ago

13

One month Kala rented 7 movies and 9 video games for a total of $85. The next month she rented 5 movies and 3 video games for a

total of $41. Find the rental cost for each movie and each video game.

1 answer:

hodyreva [135]3 years ago

4 0

$4.75 per movie and $5.75 per game. See picture for explanation.

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This problem is about componded interest. The formula for compounded interest is:

$\begin{gathered} \text{Amount}=\text{Initial}\cdot(1+r)^t \\ \text{Where,} \\ \text{Amount is the total acumulative at time t.} \\ \text{Initial is the initial amount, at t=0} \\ r\text{ is the interest in decimal number.} \\ t\text{ is the time accordingly the interest, in this case is in years.} \end{gathered}$

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$\begin{gathered} \text{Amount}=300\cdot(1+0.06)^{10} \\ \text{Amount}=300\cdot1.06^{10} \\ \text{Amount}=300\cdot1.79085 \\ \text{Amount}=537.255 \end{gathered}$

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