The image is answer.................
I think the answer is Letter C - 0.032.
Given: p - 0.1; n - 90
Required: standard deviation of the sample proportion
Solution: To get the standard deviation of the sample proportion, we will use this formula - std = √p (1 - p) / n Replace the variables with the given values, then simplify.
std = √0.1 (1 - 0.1) / 90
std = √0.09 / 90
std = √0.001
std = 0.032
Answer:
36 min
Step-by-step explanation: 18 divided by 2 is 9. so 9x 4 is 36
Answer:
406.08
Step-by-step explanation:
First FInd the area of the rectangle : which is short side * long side
-> 15*12=180m
Then find the area of the half circle, the formula of the area of a circle is 
here it's half a circle so it's
where r is 12
-> 
Finally just add the area of the rectangle with the area of the half circle
-> 