Optimizing my game size

sl-images

Hi ive made quite a simple game and its coming out at a project size 7.3mb when you click home button in the GS software. im pretty sure at least 2mb+ of this is from images i imported in but have since tweaked / updated and are used no were in the game, do i have to find the old ones manualy and delete them OR when i publish the app dose it only take the used images across ??

also

if my app is 7.3mb in GS when on the app store is it compressed by apple when people download it ie the download size for the purchaser would be say 5MB?

cheers