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frutty [35]
3 years ago
15

The time that customers wait to be served at the delicatessen for a grocery store follows the uniform distribution between 0 and

7 minutes. What is the mean of this distribution?
Mathematics
1 answer:
Mariana [72]3 years ago
7 0

Answer:

3.5

Step-by-step explanation:

Let X be our random variable  in the interval [0,7]

We notice that this is a continuous random variable of uniform distribution.

The mean of expected value of a uniform random variable X is:

E(X)=\frac{(a+b)}{2}\\\\=\frac{(7+0)}{2}\\\\\\=3.5

Hence, the mean of the distribution is 3.5

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Old Faithful in Yellowstone National Park has a predictable eruption time. The park
prisoha [69]

Answer:How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

Step-by-step explanation:

How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

5 0
3 years ago
Marisela cut four equivalent lengths of ribbon. Each was 5 eighths of a yard long. How many yards of ribbon did she cut? Express
kakasveta [241]

Answer:

2\frac{1}{2} yards.

Step-by-step explanation:

Please find the attachment.  

We have been given that Marisela cut four equivalent lengths of ribbon. Each was 5 eighths of a yard long.    

To find yards of ribbon cut by Marisela, we will multiply 4 by 5 eighths of a yard (5/8).

\text{Total ribbon cut by Marisela}=4\times \frac{5}{8}

\text{Total ribbon cut by Marisela}=\frac{4\times 5}{8}

\text{Total ribbon cut by Marisela}=\frac{20}{8}

Express answer as the sum of whole number and the remaining fractional units:

\text{Total ribbon cut by Marisela}=\frac{16+4}{8}

\text{Total ribbon cut by Marisela}=\frac{16}{8}+\frac{4}{8}

\text{Total ribbon cut by Marisela}=2+\frac{4}{8}

\text{Total ribbon cut by Marisela}=2\frac{4}{8}

Therefore, Marisela cut 2\frac{4}{8} yards of ribbon.  

7 0
4 years ago
Which is bigger 5/8 or 0.58?
Reika [66]
To find out which is larger, do 5 divided by 8, which equals 0.625. 0.625 is larger than 0.58
4 0
4 years ago
Read 2 more answers
Bridgette opened a store credit card to purchase a business suit for $463. She put the entire purchase on the credit card. Her A
irinina [24]
Begin by computing the <span>monthly interest rate like this:
</span>\frac{14.99}{12}=1.25
<span>Each month, we have to substract from $463 the monthly rate and the payment of 5%, which result in the following formula:
</span>463(1-(0.05+0.0125))^3=463\times0,9375^3\\=381.5
<span>
So, after three months, it ill remains $381.5 in </span><span>Bridgette account. </span>
5 0
3 years ago
Suppose that f(x+h)−f(x)= −6hx2−7hx−6h2x−7h2+2h3. <br> Find f′(x). <br><br> f′(x)=
Nataliya [291]
By definition,
f'(x)=Lim h->0  (f(x+h)-f(x))/h
We are already given
f(x+h)-f(x)=<span>−6hx2−7hx−6h2x−7h2+2h3=h(-6x^2-7x-6hx-7h+2h^2)
divide by h
</span>(f(x+h)-f(x))/h =h(-6x^2-7x-6hx-7h+2h^2)/h=(-6x^2-7x-6hx-7h+2h^2)
Finally, take lim h->0
f'(x)=Lim h->0  (f(x+h)-f(x))/h=(-6x^2-7x-0-0+0)=-6x^2-7x
=>
f'(x)=-6x^2-7x
8 0
4 years ago
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