A home has a triangular backyard. The second angle of the triangle is 4degrees more than the first angle. The third angle is 8de
2 answers:
Let be the first angle.
"The second angle of the triangle is 4 degrees more than the first angle" means that the second angle is
"The third angle is 8 degrees more than two times the first angle" means that the third angle is
So, on the one hand, the sum of the angles of the triangle is
On the other hand, the sum of the sides of <em>any</em> triangle is 180 degrees. So, we have
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Answer: 68
Step-by-step explanation:
Formula for sample size when prior estimate of population proportion (p) is available:
, where z*= critical-value.
E= Margin of error.
Let p be the population proportion of trees are infected with the citrus red mite.
As per given , we have
E= ± 0.08
The critical z-value corresponding to 90% confidence level = z*=1.645
Substitute all the values in the above formula , we get
Required sample size :
[Rounded to next integer.]
Thus, the minimum sample size should be taken =68