Solve the Problem $C = 0.057 x ^ { 2 } + 0.67 x + 4.6$

Multiple Choice

Solve the problem.
-The formula $C = 0.057 x ^ { 2 } + 0.67 x + 4.6$ can be used to approximate the number, $C$ , (in millions) of laptops sold over a ten-year period, where $x$ is the number of years since the first year this information was recorded. According to this formula, how many laptops were sold in year 10 ? Round the answer to the nearest tenth of a million.

A) 17 million
B) 11.9 million
C) 4.6 million
D) 15.2 million