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Auto sales in a country increased from 16.7

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Question

Auto sales in a country increased from 16.7 style=”color:rgb(0,0,0);”> million in 2014 to 17.7 million in 2015. Find the percent increase in auto sales from 2014 to 2015. Round to the nearest tenth of a percent.______%

 
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Solve the equation

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Question

Solve the equation. 2x − 3 1 5——— +

—– = —–

4 2 2

 
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In a recent year, wind machines in a country generated 183.9 billion

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Question

In a recent year, wind machines in a country generated 183.9 billion kWh of electricity, enough to serve

over 15 million households. The nation’s total electricity production that year was 4,094 billion kWh. What percent of the total energy production was generated by wind machines? Round to the nearest tenth of a percent.

_____ %

 
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When a driver decides to stop a car

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Question

When a driver decides to stop a car, it takes time first for the driver to react

and put a foot on the brake, and then it takes additional time for the car to slow down. The total distance traveled during this period of time is called the stopping distance of the car. For some cars, the stopping distance d, in feet, is given by the equation d = 0.05r2 + 1.75r,

 where r is the speed of the car in miles per hour.

 
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