Question

While gaming, a Playstation 4 uses about 140 Watts of energy. A flat-screen TV uses about 150 Watts. If you are gaming for 4 hours a day 5 times a week for a year, how much will that cost you if you pay 5 cents/kWh? Your answer should have $/kWh as the unit. *

Answer 1

Question

While gaming, a Playstation 4 uses about 140 Watts of energy. A flat-screen TV uses about 150 Watts. If you are gaming for 4 hours a day 5 times a week for a year, how much will that cost you if you pay 5 cents/kWh? Your answer should have $/kWh as the unit. *

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regardless of the time used your

energy will cost $0.05/kWh

your annual energy use will cost

$15.08

The problem statement tells you the cost

of energy is $0.05/kWh. If those are the

units required for the answer, that is the

answer.

The question, "how much will that cost

you?" suggests the units of the answer

should be dollars (not dollars per kWh). In

that case, we need to know the number

of kWh used during the year. The total

annual cost will be..

(0.14 kW +0.15 kW)4 h/day)(5 day/wk)(52

wk/yr)(1 yr)($0.05/kWh)

= (0.29) 4) (5)(52)($.05) = $15.08

Your cost will be $15.08 for theelectricity for a year.

Answer 2

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Answer:

• regardless of the time used your energy will cost $0.05/kWh
• your annual energy use will cost $15.08

Explanation:

The problem statement tells you the cost of energy is $0.05/kWh. If those are the units required for the answer, that is the answer.

__

The question, "how much will that cost you?" suggests the units of the answer should be dollars (not dollars per kWh). In that case, we need to know the number of kWh used during the year. The total annual cost will be ...

(0.14 kW +0.15 kW)(4 h/day)(5 day/wk)(52 wk/yr)(1 yr)($0.05/kWh)

= (0.29)(4)(5)(52)($.05) = $15.08

Your cost will be $15.08 for the electricity for a year.