A cone-shaped megaphone has a radius of 15 centimeters and a slant height of 20 centimeters. A megaphone has an open bottom. What is the lateral surface area of the megaphone, in square centimeters? Use 3.14 for pi.(1 point)
The lateral surface area of a cone can be found using the formula: πrℓ where r is the radius and ℓ is the slant height.
In this case, the radius is given as 15 centimeters and the slant height is given as 20 centimeters.
So, the lateral surface area of the megaphone is: π(15)(20) = 300π square centimeters.
Since we are asked to use 3.14 for π, the lateral surface area is approximately 300(3.14) = 942 square centimeters. Answer: \boxed{942}.