These two are messing with me, can someone help?
1 answer:
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Answer:
Step-by-step explanation:
information given
represent the sample mean
represent the population standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
z would represent the statistic
represent the p value for the test
Hypothesis to test
We want to test if the true mean is less than 12, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Replacing the info given we got:
We can replace in formula (1) the info given like this:
I attached an image with the complete question.
Answer:
volume of attic = 1526.04 ft³
Explanation:
Volume of cone can be calculated using the following rule:
Volume =
* area of base * height
Volume = * π * radius² * height
We are given that:
π = 3.14
radius = 18/2 = 9 ft
height = 18 ft
Substitute in the equation to get the volume as follows:
Volume = * 3.14 * (9)^2 * (18) = 1526.04 ft³
Hope this helps :)
Answer:
volume of attic = 1526.04 ft³
Explanation:
Volume of cone can be calculated using the following rule:
Volume =
Volume =
We are given that:
π = 3.14
radius = 18/2 = 9 ft
height = 18 ft
Substitute in the equation to get the volume as follows:
Volume =
Hope this helps :)