1. The cost of electricity in MT is about $0.09/kw-h. Calculate the cost of: (a)

ID: 2097746 • Letter: 1

Question

1. The cost of electricity in MT is about $0.09/kw-h. Calculate the cost of:

(a) Leaving a 60 watt porch light on for 2 weeks while you are away on vacation.

(b) Making a piece of toast in your toaster, if it takes 3 minutes and the toaster has a

rating of 900 watts.

(c) Drying a load of laundry in your dryer, which is rated at 5,200 watts. It takes 50

minutes for the load to dry.

(d) A Chevy Volt uses 8 kW-h to drive 40 miles. How much does this cost, and compare

it to a typical gasoline-only car

a)2 weeks -14 days

E=60*14*24 =20160 WH =20.16 KWH

cost =20.16*0.09 =$1.8144

E =900*(3/60) =45 WH =0.045 KWH

Cost =0.09*0.045 =$0.00405

E=5200*(50/60) =4.33 KWH

cost =4.33*0.09 =$0.39

Cost=0.09*8=$0.72

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.