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3 years ago

What part of 20 is 25?

Mathematics

2 answers:

expeople1 [14]3 years ago

7 0

I’m sorry I don’t understand

Nesterboy [21]3 years ago

6 0

Answer:

O.8

Step-by-step explanation:

I’m assuming you’re dealing with percents and fractions so

20/25 = 0.8

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There is a raffle for a $950 prize. Out of 125 tickets, each costing $18, one ticket will win the prize, and the rest will win n

mr Goodwill [35]

The expected value formula is

$E=\Sigma x\cdot P(x)$

We know that there are 125 tickets, so the probability of the ticket is

$P(x)=\frac{1}{125}$

Then, we find the expected value

$E=950\cdot\frac{1}{125}=7.60$ <h2>Hence, the expected value is $7.60.</h2>

5 0

2 years ago

Anticipated consumer demand in a restaurant for free-range steaks next month can be modeled by a normal random variable with mea

QveST [7]

A.
$\mathbb P(X>1000)=\mathbb P\left(\dfrac{X-1200}{100}>\dfrac{1000-1200}{100}\right)=\mathbb P(Z>-2)$

Since about 95% of a normal distribution falls within two standard deviations of the mean, that leaves 5% that lie without, with 2.5% lying to either side.

$\mathbb P(Z>-2)=\mathbb P(|Z|2)=0.95+0.025=0.975$

b.
$\mathbb P(1100$

About 68% of a normal distribution lies within one standard deviation of the mean, so this probability is about 0.68.

c. You're looking for $k$ such that

$\mathbb P(X>k)=0.10$

Since

$\mathbb P(X>k)=\mathbb P\left(\dfrac{X-1200}{100}>\dfrac{k-1200}{100}\right)=\mathbb P(Z>k^*)=0.10$

occurs for $k^*\approx1.2816$ , it follows that

$\dfrac{k-1200}{100}=1.2816\implies k\approx1328$

So there's a probability of 0.10 for having a demand exceeding about 1328 pounds.

3 0

4 years ago

Point L is on line segment KM. Given LM=11 and KL=4, determine the length KM.

Scorpion4ik [409]

Hey there! I'm happy to help.

Let's think of the line segment KM as a road. It starts at point K and ends at M. You start driving from point K and after 4 miles, you have reached point L. The segment KL is equal to 4 because the distance between K and L is 4.

From point L to point M, you drive 11 miles. You are now at the end of the road. We want to find out how long the road is.

From point K to point L, you drove for 4 miles.

Then, from L to M, you drove 11.

We combine these...

11+4=15

The length of KM is 15.

Have a wonderful day! :D

3 0

3 years ago

Read 2 more answers

Please answer with the correct answer<br> will mark as brainyest if you get the right answer

9966 [12]