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14.04.2020 •
Physics
A xbox is rated at 0.15 kW. This xbox is used 10 hours per day. What is the cost using this xbox each month. Assume cost of electricity is 11.42¢/kWh and there are 30 days in a month.
A. 516 ¢ ($5.16)
B. 45 ¢ ($0.45)
C. 2 ¢ ($0.02)
D. 17 ¢ ($0.17)
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Ответ:
A. 516 ¢ (**closet answer**)
Explanation:
xBox is rated 0.15 kW
in one day energy used will be 0.15kW ×10hr=1.5kwh
in 30 days energy used will be 1.5kwh×30=45kwh
rate of 1kwh is 11.42¢
so,rate for 45kwh will be 11.42×45 ≈514¢
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