POWERS AND

EXPONENTS

EXPONENTS

A number that represents how many times the

number is multiplied by itself is known as exponent.

In 82 the "2" says to use 8 twice in a multiplication,

so 82 = 8 × 8 = 64

In words: 82 could be called "8 to the power 2" or

simply "8 squared"

STANDARD FORM OF EXPONENTS

(SCIENTIFIC NOTATION)

If a quantity is written as the product of a power of

10 and a number that is greater than or equal to 1

and less than 10, then the quantity is said to be

expressed in standard form (or scientific

notation). It is also known as exponential form.

Example:643=6.43 100 = 6.43 10

In general: In converting a number to standard

form, if the decimal point is shifted to the left p

places, then p appears as a positive index in the

power of 10.

USES OF EXPONENTS

1)They are used to record earthquakes.

2)They are used when ordering carpet.

3) They are used in measuring megabytes.

4)Exponents are used regularly in measuring area.

For example, suppose an architect is asked to

design a single-story house that measure 1,500

square feet. The term "square feet" refers to an

exponent, in this case feet x feet.

5)If you are interested in saving money, you need to

use exponents. Interest is calculated using

exponents

DONE BY:

K.PRATHAM

CLASS: 8 C

ROLL NO 16