Answer
Verified
388.5k+ views
Hint: Now we know that any number in scientific notation is written as $x\times {{10}^{n}}$ where x is any number less than 10 and n is any integer. Hence we will try to write the number in the form by multiplying required power of 10 and simplify.
Complete step by step answer:
Now consider the number $72\times {{10}^{4}}$
Now we want to write the number in scientific notation. Hence we want to write the number in the form $x\times {{10}^{n}}$ where x is number less than 10 and n is any integer.
Now first we will try to write 72 as a number which is positive and less than 10 multiplied with power of 10.
Hence we can write 72 as $7.2\times 10$ where the power of 10 is 1.
Hence we have $72\times {{10}^{4}}=7.2\times 10\times {{10}^{4}}$
Now we know that ${{a}^{m}}\times {{a}^{n}}={{a}^{m+n}}$ .
Hence using this we get the number as,
$72\times {{10}^{4}}=7.2\times {{10}^{5}}$
Now we know that $7.2\times {{10}^{5}}$ is a number of the form $x\times {{10}^{n}}$ where x is number less than 10 and n is any integer
Note:
Now note that if the given number contains decimal then we will shift the decimal such that the number obtained finally is less than 10. To shift the decimal to left we will multiply by negative powers of 10 and to shift the decimal to right we will multiply with positive power of 10. For example if we have 46.3 then we will shift the decimal to left and multiply by ${{10}^{-1}}$ Hence we get $4.63\times {{10}^{-1}}$
Complete step by step answer:
Now consider the number $72\times {{10}^{4}}$
Now we want to write the number in scientific notation. Hence we want to write the number in the form $x\times {{10}^{n}}$ where x is number less than 10 and n is any integer.
Now first we will try to write 72 as a number which is positive and less than 10 multiplied with power of 10.
Hence we can write 72 as $7.2\times 10$ where the power of 10 is 1.
Hence we have $72\times {{10}^{4}}=7.2\times 10\times {{10}^{4}}$
Now we know that ${{a}^{m}}\times {{a}^{n}}={{a}^{m+n}}$ .
Hence using this we get the number as,
$72\times {{10}^{4}}=7.2\times {{10}^{5}}$
Now we know that $7.2\times {{10}^{5}}$ is a number of the form $x\times {{10}^{n}}$ where x is number less than 10 and n is any integer
Note:
Now note that if the given number contains decimal then we will shift the decimal such that the number obtained finally is less than 10. To shift the decimal to left we will multiply by negative powers of 10 and to shift the decimal to right we will multiply with positive power of 10. For example if we have 46.3 then we will shift the decimal to left and multiply by ${{10}^{-1}}$ Hence we get $4.63\times {{10}^{-1}}$
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
10 examples of evaporation in daily life with explanations
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Why is there a time difference of about 5 hours between class 10 social science CBSE