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Math problem `! About the electricity bill.
How much electricity does it take to work at 800 watts 1 hour? How much is the electricity bill (70 cents a degree)? ,

0.8* 1=0.8 degrees, 0.8*0.7=0.56 yuan.

How low is the power of 800 watts for 5 minutes? How much is the electricity bill (70 cents a degree)?

0.8 * (5/60) =115 degrees,115 * 0.7 = 7/150 yuan, which is about 0.05 yuan.

How much electricity does it take to work at 900 watts 1 hour? How much is the electricity bill (70 cents a degree)?

0.9* 1=0.9 degrees, 0.9*0.7=0.63 yuan.

900 watts, how low is five minutes? How much is the electricity bill (70 cents a degree)?

0.9*(5/60)=3/40 degrees, 3/40*0.7=2 1/400 yuan, which is about 0.05 yuan.

1300 watts 1 hour, how small is the power consumption? How much is the electricity bill (70 cents a degree)?

1.3* 1= 1.3 degrees, 1.3*0.7=0.9 1 yuan.

1300W: How low is the power consumption for 5 minutes? How much is the electricity bill (70 cents a degree)?

1.3 * (5/60) =13/120,120 * 0.7 = 911300 yuan.

1 00W1hour How small is the power consumption? How much is the electricity bill (70 cents a degree)? ,

0. 1* 1=0. 1 degree, 0. 1*0.7=0.07 yuan.

/kloc-how low is the power consumption of 0/00 watt for 5 minutes? How much is the electricity bill (70 cents a degree)?

0.1* (5/120) =1/240 degrees,1/240 * 0.7 = 7/2,400 yuan, about 0.003 yuan.