Find the square root of the number without the decimal point

Oct 13, 2025 by wbrum.org 27 views

Understanding the Problem

To find the square root of a number, we need to determine a value that, when multiplied by itself, gives us the original number. In this case, we are asked to find the square root of $$2.50 \times 10^3$$. This means we need to find a value that, when squared, equals $$2.50 \times 10^3$$.

Breaking Down the Number

Before we can find the square root, we need to break down the number $$2.50 \times 10^3$$. This is a scientific notation, which is a way of expressing very large or very small numbers in a more manageable form. In this case, $$2.50 \times 10^3$$ is equivalent to $$2,500$$.

Finding the Square Root

Now that we have broken down the number, we can find its square root. The square root of $$2,500$$ is a value that, when multiplied by itself, gives us $$2,500$$. To find this value, we can use a calculator or do it manually.

Calculating the Square Root

To calculate the square root of $$2,500$$ manually, we can use the following steps:

Find the square root of the number without the decimal point: The square root of $$2,500$$ without the decimal point is $$50$$.
Determine the decimal point: Since the original number had a decimal point, we need to determine where it should be placed in the square root. To do this, we can multiply the square root of the number without the decimal point by the square root of the decimal part.
Multiply the square root of the number without the decimal point by the square root of the decimal part: The square root of $$2.50$$ is $$1.581138830$$ (rounded to six decimal places). Multiplying this by $$50$$ gives us $$78.9069445$$ (rounded to six decimal places).

Rounding the Answer

Since we are looking for the square root of $$2.50 \times 10^3$$, we need to round our answer to the nearest whole number. Rounding $$78.9069445$$ to the nearest whole number gives us $$79$$.

Conclusion

The square root of $$2.50 \times 10^3$$ is $$79$$. This means that the correct answer is not among the options provided, which are $$5$$, $$125$$, and $$150$$. Therefore, the correct answer is D. None of the above.

Additional Tips and Tricks

When working with scientific notation, it's essential to remember that the exponent represents the power of $$10$$ that the number should be multiplied by.
To find the square root of a number in scientific notation, you can break down the number into its decimal and exponent parts, find the square root of each part separately, and then multiply them together.
When rounding numbers, it's essential to use the correct rounding rules to ensure accuracy.

Common Mistakes to Avoid

Not breaking down the number into its decimal and exponent parts: Failing to break down the number into its decimal and exponent parts can lead to incorrect calculations.
Not using the correct rounding rules: Using the wrong rounding rules can lead to inaccurate answers.
Not checking the options: Failing to check the options can lead to selecting the wrong answer.

Real-World Applications

Science and engineering: Scientific notation is commonly used in science and engineering to express very large or very small numbers.
Finance: Scientific notation is used in finance to express large or small amounts of money.
Computer programming: Scientific notation is used in computer programming to express very large or very small numbers.

Conclusion

Finding the square root of a number in scientific notation requires breaking down the number into its decimal and exponent parts, finding the square root of each part separately, and then multiplying them together. It's essential to use the correct rounding rules and check the options to ensure accuracy. The square root of $$2.50 \times 10^3$$ is $$79$$, which means that the correct answer is D. None of the above.

Q: What is the square root of a number in scientific notation?

A: To find the square root of a number in scientific notation, you need to break down the number into its decimal and exponent parts, find the square root of each part separately, and then multiply them together.

Q: How do I break down a number in scientific notation?

A: To break down a number in scientific notation, you need to separate the decimal part from the exponent part. For example, $$2.50 \times 10^3$$ can be broken down into $$2.50$$ and $$10^3$$.

Q: What is the square root of $$2.50$$?

A: The square root of $$2.50$$ is approximately $$1.581138830$$ (rounded to six decimal places).

Q: How do I find the square root of $$10^3$$?

A: The square root of $$10^3$$ is $$10^{3/2}$$, which is equal to $$10^{1.5}$$ or $$31.6227766$$ (rounded to six decimal places).

Q: How do I multiply the square roots of the decimal and exponent parts together?

A: To multiply the square roots of the decimal and exponent parts together, you need to multiply $$1.581138830$$ by $$31.6227766$$, which gives you approximately $$50$$.

Q: Why is the answer not among the options provided?

A: The answer is not among the options provided because the correct answer is $$79$$, which is not among the options $$5$$, $$125$$, and $$150$$.

Q: What is the correct answer?

A: The correct answer is D. None of the above.

Q: What are some common mistakes to avoid when finding the square root of a number in scientific notation?

A: Some common mistakes to avoid when finding the square root of a number in scientific notation include:

Not breaking down the number into its decimal and exponent parts
Not using the correct rounding rules
Not checking the options

Q: What are some real-world applications of scientific notation?

A: Some real-world applications of scientific notation include:

Science and engineering
Finance
Computer programming

Q: Why is it essential to use the correct rounding rules when finding the square root of a number in scientific notation?

A: It is essential to use the correct rounding rules when finding the square root of a number in scientific notation because incorrect rounding can lead to inaccurate answers.

Q: How can I check my answer to ensure accuracy?

A: You can check your answer by plugging it back into the original equation and verifying that it is true.

Q: What are some additional tips and tricks for finding the square root of a number in scientific notation?

A: Some additional tips and tricks for finding the square root of a number in scientific notation include:

Using a calculator to find the square root
Breaking down the number into its decimal and exponent parts
Using the correct rounding rules
Checking the options

Q: Why is it essential to check the options when finding the square root of a number in scientific notation?

A: It is essential to check the options when finding the square root of a number in scientific notation because the correct answer may not be among the options provided.

Q: What are some common misconceptions about finding the square root of a number in scientific notation?

A: Some common misconceptions about finding the square root of a number in scientific notation include:

Thinking that the square root of a number in scientific notation is the same as the square root of the decimal part
Thinking that the square root of a number in scientific notation is the same as the square root of the exponent part
Thinking that the square root of a number in scientific notation is the same as the square root of the entire number

Q: How can I overcome these misconceptions?

A: You can overcome these misconceptions by understanding the concept of scientific notation and how to find the square root of a number in scientific notation.