Final answer:
The cost of running the heaters for 5 years can be calculated using the formula: Cost = (energy usage per day) * (cost per kWh) * 365 days/year * 5 years. Given the average energy usage and cost, the cost of running the heaters for 5 years is $27,375.
Step-by-step explanation:
The cost of running the heaters for 5 years can be calculated by multiplying the energy usage (in kWh) per day by the cost per kWh, and then multiplying that by 365 (days in a year) and 5 (years).
Given that the house averages 30 kWh/day in heating cost through the year using direct electrical heating at a cost of $0.15/kWh, the cost of running the heaters for 5 years can be calculated as follows:
Cost = (30 kWh/day) * ($0.15/kWh) * 365 days/year * 5 years
Cost = $27,375