Help it's important please

What is the popular use of lithium batteries

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus

Plz a person walks 1 mile every day for exercise, leaving her front porch at 9 am and returning to her front porch at 9: 25 am what was the total displacement of her daily walk a. 1 mile b. 0 c. 25 min d. none of the above