Max can type 160 words in 5 minutes.

(-1)\times (-(-2)) \times (-(-(-3))) \times (-(-(-(-4)))

Semenov [28]

Answer: the answer that I got was 24

Step-by-step explanation:

I hope it’s right and it helps!

7 0

3 years ago

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a pine tree measured 40 and 1 over 2 feet tall. Over the next 7 and 1 over 2 years it grew to a height of 57 feet. During the 7

bogdanovich [222]

The height starts at 40.5 ft. Over 7.5 years, it grows to be 57.

40.5 + 7.5g = 57 where g = annual growth rate
7.5g = 16.5
g = 2.2 ft/yr

7 0

4 years ago

Clothing sizes are not standardized across brands. Suppose that a large study of women's size 14 jeans revealed that the mean hi

kenny6666 [7]

Using the z-distribution, we have that:

The mean hip measurement for the random sample of 15 pairs of women's size 16 jeans is of 44.1 inches.

The margin of error is of 0.8 in.

The interpretation is: Mallorie is 99% sure that the mean hip measurement of size 16 jeans is between 43.3 in and 44.9 in.

The first step to solve this question, before building the confidence interval, is finding the sample mean, which is the sum of all observations divided by the number of observations. Hence:

$\overline{x} = \frac{44.5+43.0+46.6+42.9+43.7+43.9+42.4+43.2+43.1+44.4+46.1+44.7+44.4+43.9+44.7}{15} = 44.1$

The margin of error of a z-confidence interval is given by:

$M = z\frac{\sigma}{\sqrt{n}}$

In which:

z is the critical value.
$\sigma$ is the population standard deviation.
n is the sample size.

We have to find the critical value, which is z with a p-value of $\frac{1 + \alpha}{2}$ , in which $\alpha$ is the confidence level.

In this problem, $\alpha = 0.99$ , thus, z with a p-value of $\frac{1 + 0.99}{2} = 0.995$ , which means that it is z = 2.575.

Then, the margin of error is:

$M = z\frac{\sigma}{\sqrt{n}}$

$M = 2.575\frac{1.2}{\sqrt{15}}$

$M = 0.8$

The margin of error is of 0.8 in.

The interval is:

$\overline{x} \pm M$

$\overline{x} - M = 44.1 - 0.8 = 43.3$

$\overline{x} + M = 44.1 + 0.8 = 44.9$

The interpretation is:

Mallorie is 99% sure that the mean hip measurement of size 16 jeans is between 43.3 in and 44.9 in.

A similar problem is given at brainly.com/question/25300297

6 0

3 years ago

If f (x) = 2x2 - 4x, what is the value of f(3)

poizon [28]

Answer:

f(3) = 6

Step-by-step explanation:

f(3) = 2(3)^2 - 4(3)

f(3) = 6

6 0

4 years ago

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Def is a right triangle

zlopas [31]

if indeed DEF is a right-triangle, then we can apply the pythagorean theorem and the hypotenuse is really the square root of the sum of the square of the other two, if however the hypotenuse doesn't equal that, then is not,

$\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{42}\\ a=\stackrel{adjacent}{26}\\ b=\stackrel{opposite}{23}\\ \end{cases} \\\\\\ 42=\sqrt{26^2+23^2}\implies 42=\sqrt{676+529} \\\\\\ 42=\sqrt{1205}\implies 42\ne 34.7~~\bigotimes$

5 0

3 years ago

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