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3 years ago

How much money will each student be able to spend on lunch

Mathematics

1 answer:

german3 years ago

6 0

Can you provide more information about the problem that way I can help you as much as possible

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The mean number of words per minute (WPM) typed by a speed typist is 149149 with a standard deviation of 1414 WPM. What is the p

Semmy [17]

Answer:

The probability is $P(\= X > x ) = 0.78814$

Step-by-step explanation:

From the question we are given that

The population mean is $\mu = 149$

The standard deviation is $\sigma = 14$

The random number $x = 147.81$

The sample size is $n = 88$

The probability that the sample mean would be greater than $P(\= X > x ) = P( \frac{ \= x - \mu }{\sigma_{\= x} } > \frac{ x - \mu }{\sigma_{\= x} } )$

Generally the z- score of this normal distribution is mathematically represented as

$Z = \frac{ \= x - \mu }{\sigma_{\= x} }$

Now

$\sigma_{\= x } = \frac{\sigma }{\sqrt{n} }$

substituting values

$\sigma_{\= x } = \frac{14 }{\sqrt{88} }$

$\sigma_{\= x } = 1.492$

Which implies that

$P(\= X > x ) = P( Z > \frac{ 147.81 - 149 }{ 1.492} )$

$P(\= X > x ) = P( Z > -0.80 )$

Now from the z-table the probability is found to be

$P(\= X > x ) = 0.78814$

5 0

3 years ago

the average temperature at the south pole is -49.62and the average temperature at north pole is -34.68. how much higher is the a

Alecsey [184]

-34.68 - (-49.62) = -34.68 + 49.62 = 14.94 degrees warmer at the north pole

7 0

3 years ago

I need help with the problem below

wolverine [178]

A and C is your answer

3 0

3 years ago

Read 2 more answers

4 (12x−5.6)=0.5(3x+0.7)<br><br> Im confuzzled

sergiy2304 [10]

Answer:

0.49 or 49/100

Step-by-step explanation:

So what you have to do here is distribute the 4 to the numbers in the parenthesis next to it. You also have to distribute the 0.5 to the numbers in the parenthesis next to it. So then that would make your equation become 48x-22.4=1.5x+0.35. After this step, you then have to solve for the variable, x. To do this, you would have to go backwards using PEMDAS, so first you add the 22.4 to the other side, making the equation 48x=1.5x+22.75. Then you would subtract 1.5x to the opposite side, makint the equation 46.5x=22.75. Now once you're here, you will divide the 46.5 by 22.75, making x roughly equal 0.49, or if you prefer a fraction form, then 49/100.

8 0

3 years ago

Read 2 more answers

Help pls!!1!1!1!1!1!1!1!!1!1!1!1

PIT_PIT [208]

Boys - high ropes course
girls - white water rafting

hope this helps!!

4 0

2 years ago