4 years ago

Please help not sure what these are

Mathematics

1 answer:

Leviafan [203]4 years ago

7 0

Answer:

I believe it's the first one

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Doing research for insurance rates, it is found that those aged 30 to 49 drive an average of 38.7 miles per day with a standard

Alja [10]

Answer: 0.4302

Step-by-step explanation:

Given : Mean : $\mu=\text{38.7 miles }$

Standard deviation : $\sigma=\text{6.7 miles }$

Sample size : $n=60$

Also, these distances are normally distributed.

Then , the formula to calculate the z-score is given by :-

$z=\dfrac{x-\mu}{\sigma}$

For x=32.5

$\\\\ z=\dfrac{32.5-38.7}{6.7}=-0.925373134\approx-0.93$

For x=40.5

$\\\\ z=\dfrac{40.5-38.7}{6.7}=0.268656\approx0.27$

The p-value = $P(-0.93$

$=P(0.27)-P(-0.93)=0.6064198- 0.1761855=0.4302343\approx0.4302$

Hence, the required probability :-0.4302

3 0

3 years ago

Which ordered pair is the solution to the system of linear equations y=5x+8 and y= -4x-1

serious [3.7K]

Answer:

(-1, 3)

Step-by-step explanation:

y=5x+8

y= -4x-1

5x+8= -4x-1

5x+4x= -1-8

9x= -9

x= -1

y=5(-1)+8

y= -5+8

y= 3

(-1, 3)

8 0

3 years ago

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What’s the volume of a cone with the height of 18 and base of 8

sergij07 [2.7K]

Answer:

Step-by-step explanation:

8 0

4 years ago

What is the value of |−25|?

Elena L [17]

Hi there!!

The answer to this is |-25| = 25.

Hope this helped!! ☺♥

4 0

3 years ago

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Simplify (25-4)3^ times 5

Harlamova29_29 [7]

Answer:

46305

Step-by-step explanation:

6 0

3 years ago