Exercise 7.8.4. [S][Section 7.2] [Goal 7.1] [Goal 7.7] Direct current. In an article from The New York Times on November 17, 2011, headlined "From Edison's Trunk, Direct Current Gets Another Look" you can read that In a data center redesigned to use more direct current, monthly utility bills can be cut by 10 to 20 percent, according to Trent Waterhouse, 00 vice president of marketing for power electronics at General Electric. Verizon Communications, a G.E. customer, expects to save 1 billion kilowatt-hours a year from a nationwide retrofit of its data centers, 000 which translates to roughly enough to power 77,000 homes. [R208] (a) How many watt-hours is a billion kilowatt-hours? (b) About how much electricity was Verizon using in 2011, given that they hoped to save a billion kilowatt-hours per year? 1010x3 8. (c) Verify the estimate that those billion kwh are "roughly enough to power 77,000 homes". (You won't find anything useful in the original article. How else will you search?)