The Tennessee Valley Authority's coal-fired Kingston plant in Tennessee generates 10 billion kilowatt-hours a year by burning 13,000 metric tons of coal a day, supplying electricity to almost 700,000 homes. If all of the 7.7 billion metric tons of coal consumed worldwide in 2015 was converted to electricity, it would have produced approximately billion kilowatt-hours of electricity. Assume the same efficiency as the Kingston plant.

car a and b are moving in opposite directions

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32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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grav potential energy

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2