9. A party planner is designing a conical canvas tent for a child's birthday party.
The tent has no floor, and it has a radius of 3 ft, a perpendicular height of 4 ft, and
a slant height of 5 ft. If canvas sells for $23.00/yd², how much will the material
cost? (1 yard = 3 feet, Surface Area of the side of a cone = πrs). (3 marks)