7 centimeters is the same as how many inches? Round your answer to the nearest tenth.
Understand the Problem
The question is asking for the conversion of 7 centimeters to inches using the conversion factor that 1 cm is approximately 0.39 inches. The answer should be rounded to the nearest tenth.
Answer
$2.7$ inches
Answer for screen readers
The final answer is $2.7$ inches.
Steps to Solve
- Identify the conversion factor
We know that 1 centimeter is approximately equal to 0.39 inches.
- Set up the equation
To convert 7 centimeters to inches, multiply the number of centimeters by the conversion factor: $$ \text{inches} = 7 , \text{cm} \times 0.39 , \frac{\text{inches}}{\text{cm}} $$
- Calculate the result
Now, we perform the multiplication: $$ \text{inches} = 7 \times 0.39 = 2.73 $$
- Round to the nearest tenth
To round 2.73 to the nearest tenth, we look at the hundredths place (which is 3). Since it is less than 5, we round down: $$ \text{Rounded inches} = 2.7 $$
The final answer is $2.7$ inches.
More Information
The process of converting units is essential in various applications, such as science, engineering, and everyday calculations. Converting from centimeters to inches is a common task, particularly in countries that use the metric system.
Tips
- Failing to use the correct conversion factor can lead to incorrect results.
- Not rounding accurately to the nearest tenth could result in a disqualified answer.
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