Answer:
0.00137174211
Step-by-step explanation:
For any circle, the area A = πr² (where r is the radius)
The radius is always half the length of the diameter.
Since our diameter is 12, our radius must be 6.
Let's plug 6 in for r in our equation.
A = π(6)²
<em>6² = 6×6 = 36
</em>A = 36π in²
For π = 3.14...
A = 36×3.14 = 113.04 in²
Answer:
Pfffft only one. I went to California
Step-by-step explanation:
Answer:
37
Step-by-step explanation:
The first thing is to calculate critical z factor
the alpha and the critical z score for a confidence level of 90% is calculated as follows:
two sided alpha = (100% - 90%) / 200 = 0.05
critical z factor for two sided alpha of .05 is calculated as follows:
critical z factor = z factor for (1 - .05) = z factor for (.95) which through the attached graph becomes:
critical z factor = 2.58
Now we have the following formula:
ME = z * (sd / sqrt (N) ^ (1/2))
where ME is the margin of error and is equal to 6, sd is the standard deviation which is 14 and the value of z is 2.58
N the sample size and we want to know it, replacing:
6 = 2.58 * (14 / (N) ^ (1/2))
solving for N we have:
N = (2.58 * 14/6) ^ 2
N = 36.24
Which means that the sample size was 37.
For example:
L plus W
3 plus 6= 9
I plus W
4 plus 6= 10
total: 9+10= 19
(this is just an example)