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Soloha48 [4]
3 years ago
8

Find the value of bx9 when b=8

Mathematics
1 answer:
Ierofanga [76]3 years ago
4 0
B x 9
(8) x 9 = 72
multiply 8 x 9
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The answer is 1/8 (A)
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2(4 t) written in distributive property
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The distributive property: a(b\pm c)=ab\pm ac

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At a cell phone assembly plant, 77% of the cell phone keypads pass inspection. A random sample of 111 keypads is analyzed. Find
Serggg [28]

Answer:

The probability that the proportion of passed keypads is between 0.72 and 0.80 is 0.6677.

Step-by-step explanation:

According to the Central limit theorem, if from an unknown population large samples of sizes <em>n</em> > 30, are selected and the sample proportion for each sample is computed then the sampling distribution of sample proportion follows a Normal distribution.

The mean of this sampling distribution of sample proportion is:

 \mu_{\hat p}=p

The standard deviation of this sampling distribution of sample proportion is:

\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}

Let <em>p</em> = the proportion of keypads that pass inspection at a cell phone assembly plant.

The probability that a randomly selected cell phone keypad passes the inspection is, <em>p</em> = 0.77.

A random sample of <em>n</em> = 111 keypads is analyzed.

Then the sampling distribution of \hat p is:

\hat p\sim N(p,\ \sqrt{\frac{p(1-p)}{n}})\\\Rightarrow \hat p\sim N (0.77, 0.04)

Compute the probability that the proportion of passed keypads is between 0.72 and 0.80 as follows:

P(0.72

                             =P(-1.25

Thus, the probability that the proportion of passed keypads is between 0.72 and 0.80 is 0.6677.

8 0
3 years ago
What is the tangent ratio?
Xelga [282]

Answer:

The answer is opposite/adjacent

Step-by-step explanation:

Based on this saying that SohCahToa

Which means sin=opposite/hypotenuse

Cos=adjacent/hypotenuse

Tan=opposite/adjacent

The opposite is the side facing the right angle

The hypotenuse is the longest side of the triangle

The adjacent is the line that has both the right angle and opposite angle

6 0
3 years ago
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