PLEASE HELP ME PLEASE HELP ME PLEASE ITS URGENT ANS PLS A GOOD ANSWER AND I DONT KNOW IF THE ONE I PICKED IS RIGHT
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:
Given the two triangles are shown:
First triangle has sides x cm , 6 cm and 12 cm.
and
Second triangle has sides 20 cm , 8 cm and 16 cm.
Since, the given two triangles are Similar.
⇒there corresponding sides are in proportion.
i,e
(a)
Solve for x;
By cross multiply we have;
Divide both sides by 16 we get;
cm
(b)
Find x using the ratio sides:
By cross multiply we have;
Divide both sides by 8 we get;
or
cm
The value of x =15 cm in both a and b is same because the given two triangles are similar,
by definition of similarity, the given triangles have their corresponding sides are in proportion.