Question 1095674
.
<pre>
The condition says

V(t) = {{{V[0]/2^(2t)}}},

where V(t) is the current volume, {{{V[0]}}} is the initial volume and t is time in hours.


In 1.5 hours,  v(1.5) = 70 : 2^(2*(3/2)) = {{{70/2^3}}} = 8.75 cibic meters.




Or, 3/2 hours is 3 times (1/2) of an hour.


So, divide 70 by 2 three times.


You will get the same answer.
</pre>