Answer
$q=1.4\times10^4C$
Work Step by Step
We know that
$i=\frac{q}{t}$
or $q=it$ ...........(1)
We also know:
$P=Vi$
or $i=\frac{P}{V}$
Thus, equation (1) becomes
$q=\frac{Pt}{V}$
$t=5\times3600=18000s$
We plug in the known values to obtain:
$q=\frac{(7)(18000)}{9}=1.4\times10^4C$
