How do you evaluate #(1.4\times 10^ { 5} ) - ( 6.2\times 10^ { 4} )#?

1 Answer
Feb 20, 2017

Answer:

You first convert, so that the #10#-powers are equal.

Explanation:

#1.4xx10^5=1.4xx10xx10^4=14xx10^4#

And then:
#=(14xx10^4)-(6.2xx10^4)=(14-6.2)xx10^4=7.8xx10^4#

If significance is important this should be rounded to #8xx10^4#