This question has two parts
Fun World Theme Park is building a new roller coaster that goes underground at one point. The equation E(t)=t^2-14t+33 represents the elevation, E, in feet and the time, t in seconds, of the roller coaster's path

Part A
Which statement correctly interpret the vertex?

A.) The roller coaster reached a minimum height of 16 feet underground.
B.) The roller coaster reaches a minimum height of 7 feet above ground.
C.) The roller coaster reaches a maximum height of 7 feet underground.
D.) The roller coaster reaches a maximum height of 16 feet underground.

Part B
Which of the following statement is true?

A.) The roller coaster is underground for 11 seconds.
B.) The roller coaster is above ground for 11 seconds.
C.) The roller coaster is above ground for 8 seconds.
D.) The roller coaster is underground for 8 seconds.