Daytonians had been struggling along for years with an outmoded municipal electric system which had its current generated in the steam plant of a local sawmill. Already the city had been forced to pay for new equipment without having any part in its management. In 1934 the city was called upon to invest money for the patching up of this decrepit private plant, which was daily threatening to close down and leave the city without power. City commissioners talked the matter over. “If the TVA is going to start giving people around here cheap electricity,” they reasoned, "by gosh, Dayton is more entitled to it than anybody else." So at the request (one might almost say demand) of the commissioners, TVA worked out a system for local distribution. Though Dayton’s rates had been about the lowest of any municipal system in the section, the following table shows what this transfer meant to her in dollars and cents: Rates Before TVA First 20 kilowatt-hours. . . . . . . . . . . . . 8 cents each Next 30 kilowatt-hours . . . . . . . . . . . . 7 cents each Next 50 kilowatt-hours and over . . . . . 5 cents each Present TVA Rates First 40 kilowatt-hours. . . . . . . . . . . . . . 3 cents each Next 150 kilowatt-hours . . . . . . . . . . . 2 cents each Next 200 kilowatt-hours . . . . . . . . . . . . 1 cent each Next 1,000 kilowatt-hours . . . . . . . . . . . . . . . 4 mills Briefly, TVA cut the average Daytonian’s electric bill by about two thirds. In the five years since the contract was made the number of power users in Dayton has increased from 637 to 923. And the total number of kilowatt-hours per consumer has almost doubled. Meanwhile the city of Dayton has made a net profit of $58,000, and now makes a monthly profit of almost $4,000.
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Ответ:
A( 0, 2), B (2, 5), and C (−1, 7)
Part AThe length sides of the triangle are
AB , AC and BC
For AB A( 0, 2), B (2, 5)
| AB | = √ ( 2 - 0)² + ( 5 - 2)²
= √ 2² + 3² = √ 4 + 9
= √13 units
For AC A( 0, 2), C (−1, 7)
| AC | = √ ( - 1 - 0)² + (7-2)²
= √1 + 5² = √ 1 + 25
= √ 26 units
For BC B (2, 5), C (−1, 7)
| BC | = √ ( - 1 - 2)² + (7-5)²
= √ (-3)² + 2² = √ 9 + 4
= √13 units
Part B.For AB A( 0, 2), B (2, 5)
Slope = 5 - 2 / 2 - 0 = 3/2
For AC A( 0, 2), C (−1, 7)
Slope = 7-2/ -1-0 = 5/-1 = - 5
For BC B (2, 5), C (−1, 7)
Slope = -1-2/7-5 = -3/2
Part CThe triangle is an isosceles triangle since two sides | AB | and | BC | are equal that's they both have √13units.
Hope this helps you