Acompany in the united states produces packs of pokemon cards. according to the company, 45% of the cards feature normal-type pokemon, 25% feature fire-type pokemon, 20% feature water-type pokemon, and 10% feature electric-type pokemon. in a pack of 40 cards, what is the expected count of water-type pokemon?

When cell phones were first entering the market, they were relatively large and reception was undependable. all cell phones were essentially the same. but as the technology developed, many competitors entered, introducing features unique to their phones. today, cell phones are only a small fraction of the size and weight of their predecessors. consumers can buy cell phones with color screens, cameras, internet access, daily planners, or voice activation (and any combination of these features). the history of the cell phone demonstrates what marketing trend?