Question

. Express the following numbers in usual form a)7x10-​

Answer 1

A number expressed in the form of k × 10ⁿ, where k is a terminating decimal such that 1 ≤ k <10 and n is any Integer , is said to be in scientific notation or standard form  of notation.

In standard exponential notation, the number is always written with only one digit to the left of the decimal.

If the decimal point moves to the left or the number is large, add the number of places the decimal move to the current exponent of ten.

If the decimal point moves to the right or the number is small, subtract the number of places the decimal moves from the current exponent of ten.

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Solution:

i)

3.02 x 10^-6 = 0.00000302

ii)

4.5 x 10^4 =45000

iii)

3 x 10^-8 = 0.00000003

iv)

1.0001 x 10^9 =1000100000

v)

5.8 x 10^12 =5800000000000

 

vi)

3.61492 x 10^6 =3614920

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Hope this will help you.