Digicam Megapixels

My digicam is only 7.2megapixels.How about its memory card? Is it 7.2megapixels too?I gonna tell you guys how to distinguish the megapixel of your memory card. The megapixel ratings determine print size but more megapixel do not mean better quality.Five megapixel can already produce 8.5x6.5 inch prints.Zoom levels can only cause noise on images.You have to ignore this figure and look at optical zoom ranges instead.