Kim had 13 pencils she gave some pencils to her friend and then she got two new pencils now she has 9 pencils how many pencils did she give to her friend

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.