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diamong [38]
3 years ago
5

Mr. Johnson spots a parrot in a tree at an angle of elevation of 40 degrees. If he is 60 feet away from the base of the tree, ho

w TALL is the tree?
Mathematics
1 answer:
Aliun [14]3 years ago
7 0
Tan(40) = .84
.84/1 = x/60
x = 50.4

The height of the tree equals 50.345 rounded to 50.4
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Please answer this as soon as possible.
OleMash [197]

Answer:1st one is acute 2nd one is also acute 3rd one is obtuse last one is right

Step-by-step explanation:

Because I learned this already

7 0
3 years ago
Birthdays of hockey players: In Malcolm Gladwell’s book "Outliers" he shares the work of Canadian psychologist Roger Barnsley, w
alexgriva [62]

Answer:

The P-value is 0.009.

Step-by-step explanation:

We are given that after debating whether this set of hockey players can be viewed as a random sample of hockey players, they decide to run a hypothesis test anyway to practice finding the P‐value.

<em><u>We are given that the following hypothesis below;</u></em>

Null Hypothesis, H_0 : p = 0.25

Alternate Hypothesis, H_A : p > 0.25

Now, the test statistics that was used here for the above hypothesis would be;  

                       T.S.  =  \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

Also, the test statistics given to us is 2.37.

<u></u>

<u>SO, the P-value of the test statistics is given by the following formula;</u>

             P-value = P(Z > 2.37) = 1 - P(Z \leq 2.37)

                           = 1 - 0.99111 = 0.00889 ≈ 0.009

<em>The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.99111.</em>

Therefore, the required P-value is 0.009.

6 0
3 years ago
F(x)=2x-3 and g(x)=x^2-5, find (fog) (x) and (gof) (x)
Alexxandr [17]
F(g(x)) = 2(x^2-5)-3
= 2x^2-13

g(f(x)) = (2x-3)^2 - 5
= 4x^2 + 9 -12x -5
= 4x^2 -12x + 4
6 0
3 years ago
What is 90/70<br> Simplified
allsm [11]

As an improper fraction, the simplified answer would be 9/7 after you divide both top and bottom by 10

------------------------

If you need a mixed number, then 9/7 converts to 1 & 2/7 because

9/7 = 1 remainder 2

If you had 9 cookies and 7 friends, then each friend gets 1 whole cookie, and there will be 2 left over.

3 0
3 years ago
Read 2 more answers
I'm not sure about 38 - 53 please help! :)
enot [183]
Just do for example on number 38 you will do 6.8/1000= 0.0068 which is the answer
4 0
3 years ago
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