Thread: (help me in this questions )

Hi
always I do some mistake when i solve like this questions because i can't write answer with 4 significant digits or 3 or .... ??
Now i want check my answer are this ok or no

Originally Posted by r-soy

Hi
always I do some mistake when i solve like this questions because i can't write answer with 4 significant digits or 3 or .... ??
Now i want check my answer are this ok or no

I've got:

thanks a lot