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4 years ago

5

in order to pass this years math class miriam needs to get at least an 82% write an inequality that shows the scores Miriam coul

d get to pass her math class please show work

1 answer:

xeze [42]4 years ago

7 0

X>-82%.................

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Suppose a normal distribution has a mean of 38 and a standard deviation of

Sauron [17]

Answer:

77.4% probability that a data value is between 36 and 41

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 38, \sigma = 2$

What is the probability that a data value is between 36 and 41?

This is the pvalue of Z when X = 41 subtracted by the pvalue of Z when X = 36.

X = 41

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{41 - 38}{2}$

$Z = 1.5$

$Z = 1.5$ has a pvalue of 0.933

X = 36

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{36 - 38}{2}$

$Z = -1$

$Z = -1$ has a pvalue of 0.159

0.933 - 0.159 = 0.774

77.4% probability that a data value is between 36 and 41

3 0

3 years ago

PLEASE HELP FAST! MULTIPLE CHOICE! I HAVE 3 MINUTES! PLEASE SHOW A LITTLE WORK I DONT NEED MUCH!

Ksivusya [100]

Answer:

B

Step-by-step explanation:

just multiply 8.50 times 4 and all the numbers in the problem

4 0

3 years ago

The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean o

Hunter-Best [27]

3.6 - 3.2
z = ----------------
0.8

= 0.4/0.8 = 0.50 (answer)

6 0

3 years ago

Determine an expression for dy<br> dx given that x = sin3<br> (t)andy = cos3<br> (t)

shtirl [24]

Answer:

$\frac{dy}{dx} =-\sqrt[3]{\frac{y}{x} }$

Step-by-step explanation:

Recall that using the chain rule we can state:

$\frac{dy}{dt} =\frac{dy}{dx}*\frac{dx}{dt}$

and therefore solve for dy/dx as long as dx/dt is different from zero.

Then we find dy/dt and dx/dt,

Given that

$x=sin^3(t)\\dx/dt = 3 sin^2(t)* cos(t)$

And similarly:

$y=cos^3(t)\\dy/dt=-3\,cos^2(t)*sin(t)$

Therefore, dy/dx can be determined by the quotient of the expressions we just found:

$\frac{dy}{dx} =\frac{dy/dt}{dx/dt} =\frac{-3\,cos^2(t)*sin(t)}{3\,sin^2(t)*cos(t)} =-\frac{cos(t)}{sin(t)}$

now notice that we can find $cos(t) = \sqrt[3]{y}$ from the expression for y,

and $sin(t) = \sqrt[3]{x}$ from its expression for x.

Therefore dy/dx can be written in terms of x and y as:

$\frac{dy}{dx} =-\frac{cos(t)}{sin(t)}=-\sqrt[3]{\frac{y}{x} }$

4 0

3 years ago

Amia went to a flower farm and picked fff flowers. When she got home, she put the flowers in 4 vases, with 22 flowers in each va

Rus_ich [418]

If you are looking for the total number of flowers the equation should be 22 multiplied by 4 to get 88

3 0

4 years ago

Read 2 more answers