Karim is painting a design on a cylindrical barrel. The height of the barrel is 1.2 m.
The radius of its base is 0.3 m. What area
will the paint have to cover? (Remember to
include the bottom and lid of the barrel.)

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex

you have 6 equal triangles, find the area of one of them (b*h/2) and multiply by 6

(8*4: 2)*6 =

32 cm² is your answer