I can tell you the answer is NOT 12.6 or 12.6803 or anything like that

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

17 in long 1.3 ft wide and 8in high what is the volume