I think they use experimental probabilities because experiment probabilities are WAY reliable than theoretical probability
The Answer Is A! The person is giving a response back
The answers and explanations are in the picture
To do this you have to fill in the equation

, but you don't know the height, so we'll use

for height. Plugging in the numbers you gave me, the equation is:

. To solve this, we need to find

. To find height you do

. Doing this, we get

=
3.75 ft.Hope this helped!