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Nastasia [14]
3 years ago
13

the letter "T" makes up an estimated 8% of a certain language. Assume this still correct. A random sample of 1000 letters is tak

en from a randomly selected, large book and the t's are counted. find the approximate probability that the random sample of 1000 letters will contain 7.4% or fewer t's​
Mathematics
1 answer:
rusak2 [61]3 years ago
8 0

Answer:

0.242

Step-by-step explanation:

p = 0.08, q = 1 − p = 0.92, and n = 1000.

The mean and standard deviation are:

μ = p = 0.08

σ = √(pq/n) = 0.00858

The z score is:

z = (x − μ) / σ = -0.70

Using a calculator or z score table, the probability is:

P(Z < -0.70) = 0.242

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Annabelle’s bicycle has a wheel radius of 13 inches. She places a sticker on the wheel so that its minimum height above the grou
Alchen [17]

Answer:

y=12.5 sin(180\pi x-\frac{\pi}{2})+13

Step-by-step explanation:

In order to solve this we can start by drawing a sketch of the problem (see attached picture)

So fist, let's take the general form of a sinusoidal movement:

y=Asin(\omega x+\phi)+b

where:

A= amplitude

\omega= angular frequency

x= time

\phi = horizontal shift

b= vertical shift.

In this case, the amplitude will be the maximum distance between the center of the wheel and the highest or lowest point of the trajectory, in this case:

A= 13in - 0.5in =12.5 in

The angular frequency is how many radians the wheel will turn in a minute, so we get:

\omega=\frac{90 rev}{min}*\frac{2\pi rad}{1 rev}

\omega=180\pi rad/min

Generally, the sin function will start at the center of the circular movement. In this case, since it starts on the lowest point, we can say that the graph moves right by \frac{\pi}{2} rad, so in this case:

\phi=-\frac{\pi}{2}

and finally, the vertical shift is the distance between the center of the circular movement and the ground so in this case:

b=13in

so when putting it all together we get our equation to be:

 y=12.5 sin(180\pi x-\frac{\pi}{2})+13

4 0
3 years ago
The function g(x) is a transformation of the cube root parent function,
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Answer:

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c

6 0
3 years ago
Daniel wants to prove that the interior angles of any triangle sum to 180°. He draws a line through one vertex parallel to the o
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Alternate interior angles theorem.

<u>Step-by-step explanation:</u>

By using the definition of Alternate Interior Angles theorem, we can say that If a transversal cuts any two parallel lines, then those pairs of alternate interior angles are seems to be  congruent.

So in the given triangle,

∠4 ≅ ∠2

∠5 ≅ ∠3

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∠1 + ∠2 + ∠3 = 180°

Since from the above congruence, we can write that

∠1 + ∠4 + ∠5 = 180°

Hence proved.

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3 years ago
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In macroeconomics, a variety of economy-wide phenomena is thoroughly examined such as, inflation, price levels, rate of growth, national income, gross domestic product and changes in unemployment.( It focuses on trends in the economy and how the economy moves as a whole)
7 0
3 years ago
PLEASE HELPPPPPPPPPPP
damaskus [11]

Answer:

A.   x < -4  or  x >= 3

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A solid dot at 3, and shading to the right, means all numbers greater than or equal to 3.

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Answer: A.   x < -4  or  x >= 3

3 0
3 years ago
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