Question 21 of 28 Map coa Sapling Learning macmillan learning The graph shows th

Question

Question 21 of 28 Map coa Sapling Learning macmillan learning The graph shows the electrical energy consumption of a typical household over the period of 24 hours starting at midnight. Rank the usage of electric power at the specified times 105 90 75 Least Power Usage 3:00 a.m 11:30 a.m. (MJ) 7:40 p.m. 7:00 a.m. Greatest Power Usage 30 15 10 14 18 20 224 There is a hint available! View the hint by clicking on the bottom divider bar. Click on the divider bar again to hide the hint. Close Previous Give Up & View Solution O Check Answer Next Exit Hint

Explanation / Answer

Power usage = E/t

At 3 am = 5*10^6 / 3*60*60 = 462.96 W

at 11.30 am = 40*10^6 / 11.5*60*60 = 966.18 W

at 7.40 pm = 88 *10^6 / ( 19.67*60*60) = 1242.73 W

at 7 am = 15*10^6/ ( 7*60*60) = 595.23 W

3 am < 7 am <11.30 am < 7.40 pm

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