camperangie3364
30.05.2020 •
Biology
Which statement best explains how humans would benefit from replacing fossil fuels with geothermal energy?
Less cost-effective over time
Lower installation costs than fossil fuel plants
More energy plant locations available
Less pollution than fossil fuel plants
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Ответ:
a. not true. This confuses the diameter (=2r) with the radius (=r).
b. correct. 2πr = 6.28 when 2r=2.
c. correct. if 2πr = 2π, then r must be 1, so area πr² = π1² = π
d. not true. if 2πr = π, then r must be 1/2, so area πr² = 1/4π
e. correct. if r = 1.5, then πr² = 3.14*(1.5)² = 7.065