Define the parameter of interest, the appropriate null and alternative hypotheses, and explain what Type I and Type II errors mean in the context of the situation. To curb CO2 emissions, the government subsidized the purchase of green vehicles. Now, a study wants to investigate whether the average CO2 emissions from cars purchased last year has dropped from the 160 g/km of 5 years.σ known CI and Z test

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

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6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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yes

step-by-step explanation:

yes

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