Question 156776
You were given:
V=48T^2 
where
V is "vertical leap"
T is time 
.
The problem gives you:
v = 30 inches
.
Simply plug it into the equation and solve for T:
V=48T^2 
30=48T^2
30/48 = T^2
sqrt(30/48) = T
sqrt(0.625) = T
0.79 seconds = T