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3 years ago

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Which number line shows the graph of –3? A. number line from minus7 to 7 with point at minus4 B. number line from minus7 to 7 wi

th point at minus3 C. number line from minus7 to 7 with point at minus2 D. number line from minus7 to 7 with point at minus2

1 answer:

pogonyaev3 years ago

6 0

I would have to say B. hope this helps

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What is the absolute value of a number

BartSMP [9]

Absolute value<span> describes the distance of a </span>number<span> on the </span>number<span> line from 0 without considering which direction from zero the </span>number<span> lies. The </span>absolute value of a number<span> is never negative. The </span>absolute value<span> of 5 is 5.</span>

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3 years ago

Suppose you have a sample of size 42 with a mean of 30 and a population standard deviation of 7.4. What is the maximal margin of

9966 [12]

Answer:

The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.

Step-by-step explanation:

We have given,

The sample size n=42

The sample mean $\bar{x}=30$

The population standard deviation $\sigma=7.4$

Let $\alpha$ be the level of significance = 0.05

Using the z-distribution table,

The critical value at 5% level of significance and two tailed z-distribution is

$\pm z_{\frac{0.05}{2}}=\pm 1.96$

The value of margin of error is

$ME=z_{\alpha/2}(\frac{\sigma}{\sqrt{n}})$

$ME=1.96(\frac{7.4}{\sqrt{42}})$

$ME=1.96(1.1418)$

$ME=2.238$

The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.

4 0

3 years ago

Enter the fraction as a decimal and a percent

mash [69]

Answer:

Percent is 40%

the decimal is .40

Step-by-step explanation:

1/5 = 20%/.20

So if 1/5 is 20% 2/5 should just have 20% more resolving in 40% or .40

7 0

3 years ago

What means the same as 65?

Alina [70]

Answer:6 × 5 and 5 + 5 + 5 + 5 + 5 6 + 6 + 6 + 6 + 6

Step-by-step explanation:

3 0

3 years ago

? A mug can hold 13.46 oz of coffee without overflowing. The radius of the mug is 3 cm. Given that 1 cm3 equals 0.034 oz, what i

Elan Coil [88]

Answer:

14 cm

Step-by-step explanation:

Given:

A mug can hold 13.46 oz of coffee.

The radius of the mug is 3 cm.

Given that 1 $cm^{3}$ equals 0.034 oz.

Question asked:

What is the height of the mug to the nearest centimeter ?

Solution:

Given that 1 $cm^{3}$ equals 0.034 oz.

By unitary method:

0.034 oz = 1 $cm^{3}$

1 oz = $\frac{1}{0.034}$

13.46 oz = $\frac{1}{0.034}\times13.46 =395.88 \ cm^{3}$

A mug can hold 13.46 oz of coffee means volume of cylinder is given which is 395.88 $cm^{3}$ . Now we can find the height of the mug by using volume of cylinder formula:

volume of cylinder = $\pi r^{2} h$

$395.88=\frac{22}{7} \times3\times3\times \ h\\395.88=\frac{198 \ h}{7}$

By cross multiplication:

$395.88\times 7 =198\ h\\2771.16= 198\ h$

By dividing both side by 198

$h = 13.99$ $cm$

Therefore, height of the mug to the nearest centimeter is 14 cm.

6 0

3 years ago

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