The total monthly utility bill for the student, based on the given usage and costs, is $187.25, which includes the costs for electricity, gas, water, internet, and phone services.
Step-by-step explanation:
The student wants to calculate their monthly utility bill based on the usage of various services. Here's a step-by-step breakdown of the costs:
Electricity: 240 kwh × $.15/kwh = $36.00
Gas: 990 ft³ × $1/100 ft³ = $9.90
Water: 450 gallons × $.03/10 Gallons = $1.35
Internet: Flat rate of $40.00/month
Phone: Flat rate of $100.00/month
Adding these amounts gives us: $36.00 + $9.90 + $1.35 + $40.00 + $100.00 = $187.25. Therefore, the total monthly utility bill is $187.25, which corresponds to option D.