The line in the xyxyx, y-plane above represents the relationship between the height h(x)h(x)h, left parenthesis, x, right parenthesis, in feet, and the base diameter xxx, in feet, for cylindrical Doric columns in ancient Greek architecture. How much greater is the height of a Doric column that has a base diameter of 555 feet than the height of a Doric column that has a base diameter of 222 feet?

  21 feet

Explanation:

The graph shows the column with a diameter of 5 ft will have a height of 35 ft. Similarly, it shows a column with a diameter of 2 ft has a height of 14 ft. The wider column is taller by ...

  35 ft -14 ft = 21 ft

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

For the sat there is a reading test, math test, and a writing and language test. the act has social studies and science tests.