Water has a specific heat capacity of 4186 J/kg °C. A tank contains 500 kg of water at 10.0°C. The water is heated up to a temperature of 90.0°C. If electricity costs $0.100 per kilowatt-hour, then what is the cost of heating the water?
a) $8.75
b) $3.79
c) $6.22
d) $3.10
e) $4.65