2 angles are complementary. One of the angles is 30 degrees. The other has a label of 5n + 20. What would "n" have to be?
1 answer:
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Answer:
The degrees of freedom for this sample are 27.
The sample size to get a margin of error equal or less than 0.3656 is n=4450.
Step-by-step explanation:
The degrees of freedom for calculating the value of t are:
With 27 degrees of freedom and 95% confidence level, from a table we can get that the t-value is t=2.052.
The sample size to get a margin of error equal or less than 0.3656 can be calculated as:
Answer:
Area =
Step-by-step explanation:
A=a+b
2h=13+13
2·12=156cm²
I hope this helps you :)