Answer:
C. 14.4 kwhr.
Explanation:
To calculate the energy used by appliance first calculate the power. The formulae for calculating power(<em>P</em>) is
, where V stands for voltage and I stands for current.
In the given problem, V = 240 volts and I = 15 amp. Therefore,

Now, formulae for calculating energy used i.e. work(W) is
, where <em>t</em> is the time.
In the given question time is 4 hr. Therefore energy used will be,
Energy used (W) =
.
Keeping in mind the role the order of precedence plays in equations, what would Excel display as the result of the following equation?
=(24+75)/(6*3)
=99/18
= 5.5
18)99.0.
90.0
9.0
D. 5.5
I beleive all of the above for question one