4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola.
The microphone itself is placed on the focus of the parabola. If the parabola is 40 inches wide
and 20 inches deep, how far from the vertex should the microphone be placed?
4 inches
5 inches
8 inches
10 inches

Does anyone know of a quizlet or something for edmentrum /plato algebra 1

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.