In the diagram below, the perimeter of the triangle is equal to the perimeter of the square. What is the length of a side of the
square?
1 answer:
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Answer:
See below.
Step-by-step explanation:
The figure is a cone. The formula for the volume of a cone is:
The radius is 4.8 and the height is 2.9. Substitute:
Use a calculator:
And we're done!
Answer:
The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%
Step-by-step explanation:
Confidence interval for the proportion of people who own a tablet:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
For this problem, we have that:
99% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
Percentage:
Multiply the proportion by 100.
0.7159*100 = 71.59%
0.8841*100 = 88.41%
The 99% confidence interval for the percentage of people who own a tablet computer is between 71.59% and 88.41%