Question

What is the difference written in scientific notation?1.3 x 106 - 6.8 x 1058.84 x 10-6.67 X 1056.2 x 105-5.5 x 10Done->

Answer 1

Step1: Write out the expression

`1.3*10^6-6.8*10^5`

Step2: Write both notations to have the same exponent

`\begin{gathered} 13*10^(-1)*10^6-6.8*10^5 \\ 13*10^(6-1)-6.8*10^5 \end{gathered}`
`13*10^5-6.8*10^5`

Since the exponent are now having the same powers, take the common factor

`\begin{gathered} (13-6.8)*10^5 \\ 6.2*10^5 \end{gathered}`

The third option is correct