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Georgia [21]
2 years ago
10

5pm to 5 am how many hours

Mathematics
2 answers:
slega [8]2 years ago
8 0

Answer:

12 hours

Step-by-step explanation:

BARSIC [14]2 years ago
8 0

Answer:

12 hours

Step-by-step explanation:

You might be interested in
A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years
juin [17]

Answer: 0.55567

Step-by-step explanation:

Given : A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years. The useful lives of these refrigerators are independent.

i.e.

\mu=10\text{ years}\\\sigma=3\text{ years}

Let X_1 and X_2 are two randomly selected refrigerator's life whose sum will exceed third selected refrigerator X_3 .

So that, X =X_1+X_2-1.9\times X_3

Mean =E(X_1)+E(X_2)-E(X_3)=10+10-1.9\times10 =1

Standard deviation =\sqrt{(Var(X_1)+Var(X_1)+Var(X_1))}

=\sqrt{(3^2+3^2+(1.9\times3)^2)}

=7.1056315694

Z-score : z=\dfrac{X-E[x]}{\sqrt{Var[x]}}=\dfrac{0-1}{7.0156315694}\approx-0.14

Now , The  probability that the total useful life of two(i..e n=2) randomly selected refrigerators will exceed 1.9 times the useful life of a third randomly selected refrigerator would be :-

P(Z>-0.14)=P(Z

Hence, the required probability is 0.55567.

3 0
3 years ago
San paid $8.28 for 18 stamps at this rate how much is a cost Sam to buy 12 stands
siniylev [52]
If we pay $8.28 for 18 stamps we can find the price of one stamp by dividing by 18.

So, the price of one stamp will be
$8.28 / 18 = $ 0.46

To find the price of 12 stamps we have to multiply by 12 and finally find
$0.46 * 12 = $5.52

Hence, the cost of 12 stamps is $5.52
5 0
3 years ago
A shoe store is having a sale on sneakers. You want to buy a pair of sneakers
creativ13 [48]

Answer:

Hi there!

Your answer is:

$78

Step-by-step explanation:

To set up this equation:

75+ (.04× 75)

Change 4% into decimal format

75+ ( 3)

78

Hope this helps!

7 0
3 years ago
What is 18/90 in simplest form?
3241004551 [841]
Both the numerator and the denominator can be easily divided by 9. so you get:
2/10
as you can tell it can still be simplified. both the numerator and denominator can be divided by 2. so your final answer is
1/5
4 0
3 years ago
Read 2 more answers
Help me please, ps u don't have to answers all of them
Leni [432]
A) To find the surface area of a cube, you have to use the formula 6•a^2
meaning you just have to calculate one side and multiply it by six.
541.5 is the surface area of the cube.
B) To find the surface area for just five sides, you'll be doing the same, except instead of 6 it'll be five.
so multiply 9.5 by itself
you get 90.25
Then you multiply 90.5 by 5
You get 451.25

Unfortunately I'm not sure how to do C. good luck

5 0
3 years ago
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