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3 years ago

EASY MATH QUESTION PLEASE HELP

Mathematics

2 answers:

Arturiano [62]3 years ago

7 0

Answer:

Step-by-step explanation:

When you find the absolute value of -2, it is 2, since that is how far away from the point 0 on a line. When you divide 2 by 2, it equals 1.

mylen [45]3 years ago

5 0

Answer: h(-2) = 1

Step-by-step explanation:

1. Substitute the -2 in for x

h(-2) = l(-2)l / 2

2. Apply the absolute value signs to the -2 making it positive:

h(-2) = 2/2

3. Solve:

h(-2) = 1

Hope this helps :)

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A door delivery florist wishes to estimate the proportion of people in his city that will purchase his flowers. Suppose the true

zloy xaker [14]

Answer:

The probability that the sample proportion will differ from the population proportion by greater than 0.03 is 0.009.

Step-by-step explanation:

According to the Central limit theorem, if from an unknown population large samples of sizes n > 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:

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

As the sample size is large, i.e. n = 492 > 30, the central limit theorem can be used to approximate the sampling distribution of sample proportion by the normal distribution.

The mean and standard deviation of the sampling distribution of sample proportion are:

$\mu_{\hat p}=p=0.07\\\\\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.07(1-0.07)}{492}}=0.012$

Compute the probability that the sample proportion will differ from the population proportion by greater than 0.03 as follows:

$P(|\hat p-p|>0.03)=P(|\frac{\hat p-p}{\sigma_{\hat p}}|>\frac{0.03}{0.012})$

$=P(|Z|>2.61)\\\\=1-P(|Z|\leq 2.61)\\\\=1-P(-2.61\leq Z\leq 2.61)\\\\=1-[P(Z\leq 2.61)-P(Z\leq -2.61)]\\\\=1-0.9955+0.0045\\\\=0.0090$

Thus, the probability that the sample proportion will differ from the population proportion by greater than 0.03 is 0.009.

5 0

3 years ago

What's the area of this yellow surface? pick one of the options.

Oksi-84 [34.3K]

28 in^2

Divide shape into one rectangle and two squares:

Area of rectangle:
10 x 2 = 20 in^2

Area of one square:
2 x 2 = 4 in^2

Multiply that by 2 because we have 2 squares similar in size:
4 in^2 x 2 = 8 in^2

Add the area of the rectangle and two squares:
20 in^2 + 8 in^2 = 28 in^2

Have a nice day
Hope this helps!

4 0

2 years ago

HELP ASAP! Which is the steepest slope? A. -3 B. 1 C. 2 D. -4

olga55 [171]

Positive and negative doesn’t matter. Steepest slope is the smallest or largest number.
In this case D. -4

3 0

3 years ago

What is the volume of this oblique cone?

castortr0y [4]

Hey I tried, hope it helps... can't work it out, all the best