Business The cost (in millions of dollars) for a 30-second ad during the TV broadcast of t...

Business The cost (in millions of dollars) for a 30-second ad during the TV broadcast of the Superbowl can be approximated by

where x = 0 corresponds to the year 1980.*

(a) How much did an ad cost in 2005?

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(b) If this trend continues, will the cost of an ad reach $4 million by 2020?

*Based on data from Ad Age and the St. Louis Post–Dispatch.