A 178milelong bridgetunnel costs 214 million Find the averag

A 17.8-mile-long bridge-tunnel costs $214 million. Find the average cost per mile. Write your answer using scientific notation The average cost per mile is $________________. (Round to the nearest hundredth as needed. Use scientific notation. Use the multiplication symbol in the math palette as needed.)

Solution

A 17.8-mile-long bridge-tunnel costs $214 million

----average cost per mile = $ 214 million/17.8 = 2.14 x 10^8/1.78 x 10^1 = $ 1.20 x 10^7 per mile