## Thinking Mathematically (6th Edition)

The amount of money made by motion pictures in year 2005 is $8.832\times {{10}^{9}}$dollar.
From the given data to calculate the amount of money made by motion picture, multiply both values. First convert the number of tickets and average price in Scientific notation. $1\text{ million}=1\times {{10}^{6}}$ The number of tickets is: \begin{align} & 1380\text{ million}=1380\times {{10}^{6}} \\ & =\left( 1.380\times {{10}^{3}} \right)\times {{10}^{6}} \\ & =1.380\times \left( {{10}^{3+6}} \right) \\ & =1.380\times {{10}^{9}} \end{align} Average Price per ticket = \$ 6.40 Amount of money made is: \begin{align} & \text{The number of tickets sold }\!\!~\!\!\text{ Average }\!\!\times\!\!\text{ Price per ticket}=\left( 1.380\times {{10}^{9}} \right)\times \left( 6.40 \right) \\ & =8.832\times {{10}^{9}} \end{align} Hence, the amount of money made by motion pictures in year 2005 is $8.832\times {{10}^{9}}$dollar.