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3 years ago

15

A normal population has a mean of 57 and a standard deviation of 13. You select a random sample of 9. Compute the probability th

at the sample mean is: (Round your z values to 2 decimal places and final answers to 4 decimal places):

1 answer:

Keith_Richards [23]3 years ago

6 0

Yes that’s correct I think

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162 WATER BOTTLES IN 9 CASES =

4vir4ik [10]

Assuming this question is trying to enquire as to how many bottle of water there are in each case, you simply need to divide 162 by 9 to find the answer, which is that there are 18 bottles of water in each case.

7 0

3 years ago

Read 2 more answers

2.<br> Which of the functions below is an inverse of the quadratic function f(x) = x2 - 3 ?

mezya [45]

Answer:

the inverse of the quadratic function $f(x) = x^2 - 3$ is $\mathbf{f^{-1}(x)=\pm \sqrt{x+3}}$

Step-by-step explanation:

We need to find inverse of the quadratic function $f(x) = x^2 - 3$

Let

$y=x^2-3$

Replace x and y

$x=y^2-3$

Now, we will solve for y

Adding 3 on both sides

$x+3=y^2-3+3$

$x+3=y^2$

Taking square root on both sides

$\sqrt{y^2}=\sqrt{x+3}\\y=\pm \sqrt{x+3}$

Now replace y with $f^{-1}(x)$

$f^{-1}(x)=\pm \sqrt{x+3}$

So, the inverse of the quadratic function $f(x) = x^2 - 3$ is $\mathbf{f^{-1}(x)=\pm \sqrt{x+3}}$

3 0

3 years ago

Write a numerical expression for: twenty-seven less than the quotient of fourteen and seven.

cluponka [151]

Answer:

27⊂14=7

Step-by-step explanation:

8 0

3 years ago

Ijknjhyuyyyyyyyyyyy4e47899986756ftv

Brrunno [24]

Answer:

yes

Step-by-step explanation:

7 0

3 years ago

A van and a bicycle move towards each other. The speed of the van is 80 km per hour, and the speed of the bike is 20 km per hour

otez555 [7]

:

.

-- :

Bike > ________300km_________< Van

20km/h 80km/h

In one hour, the bike will have moved 20km and the van would have moved 80km.

The distance between them was 300km. But the bike moved 20km and the van moved 80km, since its been one hour. Which means the distance between them is less.

300km-(20km+80km) = 200km

So now the distance between them is 200km.

Now another hour passes. The distance between them was 200km. But the bike moved 20km and the van moved 80km, since its been one hour. Which means the distance between them is less.

200km-(20km+80km) = 100km

So now the distance between them is 100km

Now another hour passes. The distance between them was 100km. But the bike moved 20km and the van moved 80km, since its been one hour. Which means the distance between them is less.

100km-(20km+80km) = 0km

So now the distance between them is 0km, which means they have met. If we count, it took them 3 hours.

:

Step 1)

Add both speeds. 20km+80km=100km

Step 2)

Total distance between them = 300km

So do 300km/100km = 3hours.

______

The solution is: .

————

Hope this helped!

4 0

3 years ago