Answer:
Software is a collection of instructions that tell a computer how to work. This is in contrast to hardware, from which the system is built and actually performs the work.
You cant, you have to either delete items off to gain some storage back or go buy an ipad with more storage
This is happening to me too, the site may be having some issues.
Answer:
Σ
Explanation:
What symbol can you use when you want to automatically add a set of numbers together on excel?
✓ Σ This is the Greek letter Sigma. It is used to start the Autosum facility.