Values which are written in proper scientific notation are:
[tex]-3.5*10^4\\3.5*10^4\\3.5*10^-4[/tex]
What is scientific notation?
A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.
The given numbers are
[tex]1)-350\\2)-3.5*10^4\\3)0.000350\\4)3.5*10^4\\5)3.5*10^-4\\6)35*10^-5\\7)3500[/tex]
As we can see that every number except first, third, sixth and seventh number has been written according to the definition of scientific notation mentioned above.
Therefore, values which are written in proper scientific notation are:
[tex]-3.5*10^4\\3.5*10^4\\3.5*10^-4[/tex]
To get more about scientific notation visit:
https://brainly.com/question/1767229
