Question

SCIENTIFIC NOTATION Rewrite in scientific notation. $$ 95.2 $$

Short answer

The number 95.2 in scientific notation is \(9.52 * 10^1\).

Step-by-step solution

Express Number in Scientific Notation

In scientific notation, the number \(95.2\) can be expressed as the product of \(9.52\) and the power of \(10^1\). This is because the decimal of the given number is shifted one position to the left, hence '\(10^1\)'. Therefore, \(95.2\) in scientific notation is \(9.52 * 10^1\)

Key concepts

Expressing numbers in scientific notation

Understanding how to express numbers in scientific notation is a fundamental skill in mathematics and science. Scientific notation is a way to write very large or very small numbers concisely. The general format for writing a number in scientific notation is to take a number greater than or equal to 1 and less than 10, and multiply it by a power of ten. This allows for efficient communication of precise figures without the confusion of too many zeros.

For example, the number 95.2 is not within the range of 1 to 10. Therefore, we adjust it by moving the decimal point to the left until we obtain a number that fits into our range. In this case, moving the decimal point one digit to the left transforms 95.2 into 9.52. To compensate for this shift, we use a power of ten. Since we moved one place, we use the power of ten to the first degree. Thus, the number 95.2 in scientific notation is expressed as \(9.52 \times 10^1\).

Decimal point manipulation

The manipulation of the decimal point is a critical aspect when converting numbers into scientific notation. When we move the decimal point to the right or left, we do so to create a new number that will be multiplied by a power of ten to equal the original number. Moving the decimal one place to the left makes the number smaller, and we compensate with a positive power of ten. Conversely, moving it to the right for a number less than one would require a negative power of ten.

Thus, understanding decimal point manipulation helps maintain the equivalence of the original and the scientifically notated number. Whether moving the decimal to the right for smaller numbers, such as 0.005 becoming \(5 \times 10^{-3}\), or to the left for larger numbers like our example of 95.2 becoming \(9.52 \times 10^1\), the base concept remains the same. The count of spaces moved dictates the exponent of ten, reflecting the shifted position of the decimal.

Powers of ten

Powers of ten play a crucial role in scientific notation, as they represent the number of times the decimal point has been shifted. In scientific notation, the exponent of ten indicates how many places the decimal point has been moved to transform the original number into a number between 1 and 10. A positive exponent means the original number was greater than 10 and the decimal was moved to the left, whereas a negative exponent indicates that the original number was less than 1, requiring the decimal to be moved to the right.

It is essential to grasp that each power of ten has a specific value: \(10^1 = 10\), \(10^2 = 100\), and so on for positive exponents, decreasing the value by a factor of ten for negative exponents such as \(10^{-1} = 0.1\). The power of ten not only provides the necessary compensation for moving the decimal point but also informs us about the magnitude and direction of that shift.