## Essential University Physics: Volume 1 (3rd Edition)

We first find the number of gallons using the fact that the cost is 1.75 dollars per gallon. Thus, we find: $g=\frac{4.95}{1.75} = 2.829 \ gallons$ We find the number of $kWh$ this is: $2.829 \times 30 = 84.86 \ kWh$ Thus, it follows: $COP = \frac{84.86}{30}=2.829$