Find the equation of the parabola with its focus at (-7,6) and its directrix at y = 4.
C A) y = 1/4(x + 5)2 + 7
C B) y=1/4(x + 7)2 + 5
C C) y=1/8(x + 7)2 + 5
CD) y = 1/4(x - 7)2 + 5

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Based on the graph, what is the initial value of the linear relationship? a coordinate plane is shown. a line passes through the y-axis at -2 and the x-axis at 3.