You got to get the correct answer for someone to do that. If there is a slight issue, than thats why its marked as good.
There are a few possibilities, you could have 60 degrees 30 degrees and 90 degrees, for one triangle those added up equal 180 which is needed to make a right triangle. Another possibility would be 45 degrees 45 degrees 90 degrees, those added up equals to 180 degrees. :D
The answer should be f(x)= 3x^2 + 2x + 14
Correct answer is B bc it extends the range of her times, creating variation.