What is the difference written in scientific notation? 0.00067 - 2.3 x 10^5

The first set of numbers are in standered form while the other is in scientific notation. Scientific Notation is a process in which makes a long numbered number into a shorter version. To make a number scientific notation, you must put the first number between 0-10.

The problem would be 6.7 x 10^-4 - 2.3 x 10^5. The answer would be 4.4 x 10^1. First you have to know what to do with the powers. You subtract them because it is a subtraction problem. Then you subtract the numbers and then you have the answer.

0.00067=67X10^5 so

67X10^5-2.3X10^5

64.7X10^5 which can be expressed as:

6.47X10^6

(not sure if it matters to you or not, but technically we only had two significant figures so it should be rounded to 6.5X10^6)