In order to open the clam it catches, a seagull will drop the clam repeatedly onto a hard surface from high in the air until the shell

Question

cracks.
If a seagull flies to a height of 28.7 m, how
long will the clam take to fall? The accelera-
tion of gravity is 9.8 m/s2 .
Answer in units of sec

Answer 1

28.7 = (1/2)(9.8) t^2

Answer 2

How do you solve for t