50° 60°
30 ft
А B
Two bird-watchers A and B are looking at a bird C at
the top of the tree of height h.
2) Find the length x.
f) 62.53 ft
g) 63.44 ft
h) 64.35 ft
j) 65.26 ft
k) 66.17 ft

50°

60°
30 ft
А B
Two bird-watchers A and B are looking at a bird C at
the top of the tree of hei

Solved

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Ответ:

macybarham

29.11.2020

Mathematics

$P(X60)=P(\frac{X-\mu}{\sigma}\frac{60-\mu}{\sigma})=P(Z\frac{60-49}{16})=P(z0.6875)$

And we can find the probability with the complement rule and the normal standard distirbution and we got:

P(z0.6875)=1-P(z

Step-by-step explanation:

Let X the random variable that represent the time spent reading of a population, and for this case we know the distribution for X is given by:

$X \sim N(49,16)$

Where $\mu=49$ and $\sigma=16$

We are interested on this probability

P(X60)

And we can use the z score formula given by:

$z=\frac{x-\mu}{\sigma}$

Using this formula we got:

$P(X60)=P(\frac{X-\mu}{\sigma}\frac{60-\mu}{\sigma})=P(Z\frac{60-49}{16})=P(z0.6875)$

And we can find the probability with the complement rule and the normal standard distirbution and we got:

P(z0.6875)=1-P(z

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50° 60° 30 ft А B Two bird-watchers A and B are looking at a bird C at the top of the tree of height h. 2) Find the length x. f) 62.53 ft g) 63.44 ft h) 64.35 ft j) 65.26 ft k) 66.17 ft