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Fudgin [204]
3 years ago
7

Reports say that the mean birth weight of babies of European heritage is 3.5 kg. Marta wants to perform a significance test to s

ee if this holds true in her nation. She takes a random sample of babies and observes a mean birth weight of xˉ=3.43 kg.Here's Marta's null hypothesis:H0 : The mean birth weight in this nation is...What is an appropriate way for Marta to finish her null hypothesis statement?a. ... not equal to 3.43 kg.b. ...equal to 3.43 kg.c. ... equal to 3.5 kg.d. ... equal to 3.5 kg.
Mathematics
1 answer:
Svet_ta [14]3 years ago
8 0

Answer:

what was the answer?

Step-by-step explanation:

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Two ships leave from the same port. One travels west 84 miles and the other travels 62 miles north. Determine the distance betwe
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The distance the ships traveled are like the legs of a triangle and the question wants to know the hypotenuse. To find the hypotenuse, use the pythagorean theorem. this is a^2 + b^2 = c^2, with a and b being the legs and c being the <span>hypotenuse.
</span>Plug in known values:
84^2 + 62^2 = c^2
Solve:
84^2 = 7056
62^2 = 3844
7056 + 3844 = c^2
7056 + 3844 = 10900
10900 = c^2
Now you just need to isolate c by finding the square root of both sides.
√10900 = 104.403
√c^2 = c

So c = 104.403, or just 104.40 when rounded to the nearest tenth.
And if c is 104.40, then that means the hypotenuse is 104.40.
And all of that basically means that the distance between the ships is 104.40 miles.
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(5x² - 3x + 5) - (3x² - 4x - 7)     Distribute/multiply - into (3x² - 4x - 7)

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3 years ago
A cosine function is a reflection of its parent function over the x-axis. The amplitude of the function is 11, the vertical shif
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We have been given that a cosine function is a reflection of its parent function over the x-axis. The amplitude of the function is 11, the vertical shift is 9 units down, and the period of the function is \frac{7\pi}{12}. The graph of the function does not show a phase shift. We are asked to write the equation of our function.

We know that general form a cosine function is y=A\cos(b(x-c))-d, where,

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c = Horizontal shift,

d = Vertical shift.    

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