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Marianna [84]
4 years ago
14

A hot air balloon to descends 305 feet per minutes for 4 minutes and then ascends at a rate of 215 feet per minute for another 2

minutes.Find the total change in the balloon's altitude

Mathematics
1 answer:
expeople1 [14]4 years ago
5 0
305 × 4 = 1220
215 × 2 = 430
1220 - 430 = 790

The change in the altitude of the balloon is 790 feet.
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Unknown to a medical researcher, 6 out of 25 patients have a heart problem that will result in death if they receive the test dr
Fiesta28 [93]

Using the hypergeometric distribution, it is found that there is a 0.0002 = 0.02% probability that exactly 6 patients will die.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • N is the size of the population.
  • n is the size of the sample.
  • k is the total number of desired outcomes.

The values of the parameters for this problem are:

N = 25, k = 6, n = 8.

The probability that exactly 6 patients will die is P(X = 6), hence:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

P(X = 6) = h(6,25,8,6) = \frac{C_{6,6}C_{19,2}}{C_{25,8}} = 0.0002

0.0002 = 0.02% probability that exactly 6 patients will die.

More can be learned about the hypergeometric distribution at brainly.com/question/24826394

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2 years ago
Find the length of the orther leg when one leg is 20 and hypotenous is 25
liberstina [14]

Answer:

15

Step-by-step explanation:

Let 'l' be the length of the other leg

Using pythagoras theorem,

25² = 20² + l²

625 = 400 + l²

225 = l²

l = 15

4 0
3 years ago
Read 2 more answers
Answer this pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeee I will mark brainliest​
Anna [14]

Answer:

the answer is B

Step-by-step explanation:

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Are u in 5th grade? Im learning the same thing LOL
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A string of decorative lights is 28 feet long. The first light on the string is 16 inches from the plug. The lights on the strin
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28 x 12 = 336
336 - 16 = 320
320 divided by 4 = 80
80
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4 years ago
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