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17.11.2020 •
Mathematics
A telephone survey of 1000 adult Americans was reported in an issue of Time Magazine. One of the questions asked was "What is the main problem facing the country?" Twenty percent answered crime. Construct a 90% confidence interval for the population proportion of adult Americans who feel that crime is the main problem.
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Ответ:
4.2 mi²
Step-by-step explanation:
Volume of a cone = (1/3)πr²h, where r = radius and h = height
(1/3)πr²h
= (1/3)×π×1²×4
= 4π/3
= 4.2 mi² (rounded to the nearest tenth)