A wooden stage at the theater is in the shape shown below. The theater needs to seal the stage. If one can of sealant covers 75 square feet, how many cans are needed?
39 ft
21 ft
21.8 ft
97
4.5 11
9 cans
10 cans
11 cans
12 cans

the correct answer is $7.38

step-by-step explanation:

look at the picture i have filled out a table for it. hope this .

the equation of the parabola is y2=12x

explanation:

the vertex is midway between the focus ad the directrix

so, the vertex is (0,0)

let p=(x,y) be a point on the parabola.

the distance of p from the directrix is equal to the distance from the focus.

x+3=√(x−3)2+(y−0)2

(x+3)2=(x−3)2+y2

x2+6x+9=x2−6x+9+y2

y2=12x

graph{y^2=12x [-10, 10, -5, 5]}