Answer:
The value is
Step-by-step explanation:
From the question we are told that
The null hypothesis is 
The level of significance is 
From the z table the critical value of
considering the two tails of the normal curve( This is because this a two tailed test ) is

Hence the critical value is
Arjun should have divided both sides of the equation by 7 instead of multiplying.
<u>Answer:</u> C.
+ 
<u>Explanation:</u> you basically combine f(x) and g(x).
combine your terms
your final answer
hope this helps!❤ from peachimin
The most appropriate choice for similarity of triangles will be given by -
Speed of tip of the shadow of woman = 6 ft/s
What are similar triangles?
Two triangles are said to be similar, if the corrosponding angles of the triangles are same and the corrosponding sides of the triangles are in the same ratio.
Here,
The diagram has been attached here
Let the distance of woman from the pole be x ft and the distance of tip of the shadow to the pole be y ft.
Height of street light = 18 ft
Height of woman = 6ft
The two triangles are similar [As height of woman is parallel to the height of pole]

To find the speed, we have to differentiate both sides with respect to time 't'

Speed of tip of her shadow = 6 ft
To learn more about similarity of triangles, refer to the link-
brainly.com/question/14285697
#SPJ4
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