Question

Kevin writes this description on the blackboard.

“This is a way of writing a value as the product of a number, n, between 1 and 10 and a power of 10.”

What is Kevin describing?

[A] significant figures

[B] common logarithm

[C] multiplication factors

[D] scientific notation

Answer 1

Answer : The correct option is, (D) scientific notation

Explanation :

• Scientific notation : It is a way of writing the smaller and larger numbers. It is written as the product of a number between 1 and 10 and a power of 10.

For example : 550,000,000 can be written in scientific notation as
`5.5* 10^(8)`

• Significant figures : It is defined as the minimum number of digits are needed to express a number in scientific notation without a loss of accuracy.

• Common logarithm : It is defined as the base 10 logarithm is known as the common logarithm.

It is represented as,
`\log_(10)x=\log x`

• Multiplication factors : It is defined as the number that is multiplied by another to give a product.

For example :
`5* 4=20` in this, 5 and 4 are the multiplication factors.

Hence, the Kevin describing is scientific notation.

Answer 2

The right option is; [D] scientific notation

Kevin is describing scientific notation.

Scientific notation is a special method of writing numbers (values) that are very small or very large. Scientific notation is used when a number between 1 and 10 is multiplied by a power of 10. For example, 800 can be written in scientific notation as 8 x 10^2.