Question 1169326
.
<pre>

The time for the bottle to drop from the level of 30 ft to the level of 1.5 ft is


    30 - 16t^2 = 1.5,


according to the given equation.


Simplify it to


    16t^2 = 30 - 1.5 = 28.5


and find 


    t = {{{sqrt(28.5/16)}}}.


Use your calculator.
</pre>

Completed.