SOLUTION: A dog leaps into the air with an initial vertical velocity of 12 feet per second. How many seconds will it be until the dog lands back on the ground?

Use the formula  t =   from Physics.


Here "u" is initial vertical velocity;

     "g" is the gravity acceleration, 32 ft/s^2.


This formula gives the time to get maximum height.


The same time is needed to fall to the ground from the upper point.


So the entire time is    +  =  +  =  =  of the second.    ANSWER