Question

What is the dofference written in scientific notation? 0.00067-2.3×10^-5

Answer 1

The number 0.00067 in scientific notation is

`67*10^(-5)`

because we can move the point 5 places to the right:

Now, both numbers have the same power, then

`\begin{gathered} 0.00067-2.3*10^(-5)​=67*10^(-5)-2.3*10^(-5) \\ then \\ 0.00067-2.3*10^(-5)​=(67-2.3)*10^(-5) \end{gathered}`

since 67-2.3 = 64.7, the answer is

`0.00067-2.3*10^(-5)​=64.7*10^(-5)`