1.In 1980, about 2 million people took cruisestoday it's 16 million. From 2011 through 2012, 22 new ships will be built at a cost of $4.6 billion. Five of them will be Concordia-size mega ships. And, it's unlikely that this recent tragedy in which at least 11 lives were lost will make a dent in this growth. The seduction of cruising is simply too great especially for North Americans who make up more than 70% of cruise-goers.

c.If this growth rate continues, what number of people will go on cruises in another 32 years, in2044?