What values of b satisfy 3(2b + 3)2 = 36?
1 answer:
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Answer:
The probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is P=0.412.
Step-by-step explanation:
We know the population proportion π=0.8, according to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.
If we take a sample from this population, and assuming the proportion is correct, it is expected that the sample's proportion to be equal to the population's proportion.
The standard deviation of the sample is equal to:
With the mean and the standard deviaion of the sample, we can calculate the z-value for 0.79 and 0.81:
Then, the probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is:
Answer:
Area of shaded region is:
A = 92.41
Step-by-step explanation:
(As the diagram is not shown, consider the diagram attached below.)
r = 9
So
Diagonal of the square = 2r = 18
As all angles of square are of 90°
The diagonal is dividing the angles into 2 halves of 45° at point where diagonal is joining the corner.
Taking sine:
Area of circle - Area of square
