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4 years ago

10

Piz help me!!!!

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1 answer:

s344n2d4d5 [400]4 years ago

7 0

Here is my solution to this question worked out on paper:

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Using the ratio of perfect squares method, what is square root of 89 rounded to the nearest hundredth? Use the ratio of perfect

lara [203]

Sqrt(89) ≈ sqrt(361/4) = 19/2 = 9.5

5 0

3 years ago

An experimental drug is administered to 80 randomly selected individuals, with the number of individuals responding favorably r

Solnce55 [7]

Answer:

Yes, because the experiment satisfies all the criteria for a binomial experiment.

Step-by-step explanation:

A binomial experiment has the following criterias,

1. There must be a fixed number of trials

2. Each trial is independent of the others

3. There must be only two outcomes ( success and failure )

4. The probability of each outcome is same.

Given,

An experimental drug is administered to 80 randomly selected individuals, with the number of individuals responding favorably recorded,

The number of trials = 80 ( fixed )

Each individuals is independent,

Total outcomes = 2 ( yes or no ),

Also, the probability of each individual is same,

Hence, the given probability experiment represent a binomial experiment.

3 0

3 years ago

850 projects were entered in the science fair. If 86% of the projects did not receive a ribbon, then how many student projects d

Reptile [31]

Answer:

731 of the projects received a ribbon.

Step-by-step explanation:

850 x 0.86 = 731

Hope this helps!

5 0

3 years ago

For the function f(x) = 3(x - 1)2 + 2, identify the vertex, domain, and range. (2 points)

son4ous [18]

Answer:

2) The vertex is (1, 2), the domain is all real numbers, and the range is y ≥ 2.

Step-by-step explanation:

Look at the photo below for the graph.

:)

8 0

3 years ago

8.23 A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators

Kitty [74]

Answer:

The 95% confidence interval estimate for the population mean force is (1691, 1755).

Step-by-step explanation:

According to the Central Limit Theorem if we have an unknown population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample mean will be approximately normally.

The sample selected here is <em>n</em> = 30.

Thus, the sampling distribution of the sample mean will be normal.

Compute the sample mean and standard deviation as follows:

$\bar x=\frac{1}{n}\sum x=\frac{1}{30}\times 51702=1723.4\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{30-1}\times 232561.2}=89.55$

Construct a 95% confidence interval estimate for the population mean force as follows:

$CI=\bar x\pm z_{\alpha /2}\times\frac{s}{\sqrt{n}}$

$=1723.4\pm 1.96\times\frac{89.55}{\sqrt{30}}\\\\=1723.4\pm 32.045\\\\=(1691.355, 1755.445)\\\\\approx (1691, 1755)$

Thus, the 95% confidence interval estimate for the population mean force is (1691, 1755).

3 0

3 years ago