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3 years ago

I need help please and thank you

Mathematics

2 answers:

JulijaS [17]3 years ago

6 0

Answer:

Step-by-step explanation:

(14*14)+(48*48)=c2

196+2304=2500

squared root of 2500=50

dimulka [17.4K]3 years ago

5 0

Start with
14^2+48^2=c^2
196+2304=c^2
Add
2500=c^2
Then square root it
C=50

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In a sale the price of a pair of shoes is reduced the shoes have a normal price of £24 the shoes have a sale price of $19.20

yaroslaw [1]

Answer:

20%

Step-by-step explanation:

Step one:

given data

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From the data above, the price has been marked down by a certain percent

Required

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Step two:

Percent mark down= Normal-sale/Normal*100

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3 years ago

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IrinaK [193]

Answer:

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2 years ago

Jensen math didn’t dnsnjs

Black_prince [1.1K]

Answer:

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4 years ago

10. A random sample of 10 fibers is taken from a collection of 92 fibers that consists of 43 fibers of polymer A, 17 fibers of p

vazorg [7]

Answer:

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

Step-by-step explanation:

Hypergeometric distribution:

The probability of x sucesses is given by the following formula:

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

In which:

x is the number of sucesses.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

In this question:

Fibers are chosen without replacement, which means that we use the hypergeometric distribution.

92 fibers means that $N = 92$

Sample of 10 means that $n = 10$

No polymeter B which means that $x = 0$

17 fibers of polymeter B which means that $k = 17$

a. What is the probability that the sample does not contain any fibers of polymer B

This is P(X = 0).

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

$P(X = 0) = h(0,92,10,17) = \frac{C_{17,0}*C_{75,10}}{C_{92,10}} = 0.1150$

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

4 0

3 years ago