Answer:
33.26 m/s
Step-by-step explanation:
The initial velocity of the ball can be determined by;
R = v

Where R is the range (distance between pitcher and catcher), H is the height covered, v is the initial velocity and g is the acceleration due gravity (9.8 m/
).
So that;
18.4 = v

= v

= v

= 0.5533v
⇒ v =

= 33.2550
The initial velocity of the ball is 33.26 m/s.This is the velocity with which the pitcher threw the ball.