Answer: 271
Step-by-step explanation:
The formula we use to find the sample size is given by :-
, where is the two-tailed z-value for significance level of
p = prior estimation of the proportion
E = Margin of error.
If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes
Given : Margin of error : E= 0.05
Confidence level = 90%
Significance level
Using z-value table , Two-tailed z-value for significance level of
Then, the required sample size would be :
Simplify,
Hence, the required minimum sample size =271
Answer:
......
Step-by-step explanation:
Length of diagonal of the rectangle=
√( length) ²+( breadth) ²
=√(20) ²+(12) ²
=√400+144
√544 m
. '. Length of fence= √544 m
Perimeter of the triangle formed by the diagonal of the rectangle =(12+20+√544)
=(32+√544) m
Answer:
https://newsela.com/read/lib-ushistory-roman-republic/id/27389/
Step-by-step explanation:
To find how much you save, you need to find out how much you pay for each tire. Your 2 equations are
2x=216 (x being the price of the tire, which you do not know)
x=108
4x=380
x=95
As you can see, the price of the tire from the manager's special is cheaper, but to find out by how much you subtract.
108-95=13
So you save $13 per tire.