What is the approximate volume of the cone? PLEASE HELP ASAP 38 PTS
1 answer:
Answer:
B. 2120
Step-by-step explanation:
The formula to find the volume of a cone is 1/3 h.
But lets simply find the volume of the circle first. 15 x 15 is 225. Lets put 3.14 as . So 225 x 3.14 is 706.5. The volume of a cylinder would be 706.5 x 9 is 6358.5.
A cone is 1/3 of a cylinder, so 6358.5 /3 is 2119.5
Rounded up is B. 2120 cm
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Answer:
Yes there is sufficient evidence to reject the company's evidence
Step-by-step explanation:
From the question we are told that
The sample size is n = 25
The mean is
The standard deviation is
The z-score is z = -1.94
The null hypothesis is
The alternative hypothesis is
Generally the p-value is mathematically evaluated as
From the z table the area under the normal curve to the left corresponding to -1.94 is
=>
=>
Let assume the level of significance is
Hence the this mean that
The decision rule is
Fail to reject the null hypothesis
The conclusion is
There is sufficient evidence to reject the company's evidence