How do you write 0.00643 in scientific notation?

2 Answers
Jun 1, 2016

#0.00643# in scientific notation is #6.43xx10^(-3)#

Explanation:

In scientific notation a number is written as #axx10^n#, where #n# is an integer and #a# is a number which has just one digit to the left of decimal i.e. #1<=a<10#.

Hence to write #0.00643# in scientific notation, we will have to move decimal three places to the right.

Hence #0.00643# in scientific notation is #6.43xx10^(-3)#

Aug 8, 2018

#6.43*10^5#

Explanation:

The key realization is that when we write numbers in scientific notation, we want one digit before the decimal point.

In our case, we must loop it #5# times to the left. The number of times we loop it is the exponent, and looping left makes it positive. Thus, we have

#6.43*10^5#

Hope this helps!