Identify the area of the figure rounded to the nearest tenth

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 shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Which graph represents the parent function of y=(x+2)(x-2)