i think your teacher also means to derive that formula where t on one side. here are steps to do that:
multiply both side by 2, to cancel out 1/2
now to cancel g, divide both side of the equation by g
now t is . but we're not done yet. we have to remove the exponent two by radical or square root.
now solve the problem with that formula
h = 3.5m
g = 9.81m/s
substitute from our formula.
and the answer is
step-by-step explanation: other word
54 ang answer blablablah