To start, keep in mind that scientific notation is a way of writing a number so that it is the number condensed so that it is at least 1 and less than 10 multiplied by 10 to the power of decimals you moved in order to condense it. When 700,000 is written in scientific notation, you have to move the decimal to the left 5 times so that it is now 7. Then, you have to multiply it to 10^5 to show that you moved the decimal left 5 times and so that the number remains equivalent to its value. As your answer, 700,000 would be written in scientific notation as 7*10^5
