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3 years ago

I need a little help here !

Mathematics

1 answer:

Eduardwww [97]3 years ago

4 0

It is a knowledge check
On aleks

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Which number is composed of exactly 8

Keith_Richards [23]

Answer:

B is the answer

Step-by-step explanation:

because it said 8 thousands so you know its not D and it says 7 tens so you know its not C and for 9 sense the hundredths has (ths) you know it's not A so the answer is B.

6 0

2 years ago

Read 2 more answers

PLEASE HELP!! ILL MARK BRAINLYEST!!!

Liula [17]

Answer:

The answer is 144 m 2, hope this helps!!!:)

3 0

3 years ago

A Geiger counter counts the number of alpha particles from radioactive material. Over a long period of time, an average of 14 pa

UkoKoshka [18]

Answer:

0.2081 = 20.81% probability that at least one particle arrives in a particular one second period.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given interval.

Over a long period of time, an average of 14 particles per minute occurs. Assume the arrival of particles at the counter follows a Poisson distribution. Find the probability that at least one particle arrives in a particular one second period.

Each minute has 60 seconds, so $\mu = \frac{14}{60} = 0.2333$

Either no particle arrives, or at least one does. The sum of the probabilities of these events is decimal 1. So

$P(X = 0) + P(X \geq 1) = 1$

We want $P(X \geq 1)$ . So

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-0.2333}*(0.2333)^{0}}{(0)!} = 0.7919$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.7919 = 0.2081$

0.2081 = 20.81% probability that at least one particle arrives in a particular one second period.

8 0

3 years ago

I-ready testing need help ASAP!

Leto [7]

Answer:

-11/12

Step-by-step explanation:

5 0

2 years ago

Which of the following fractions is equivalent to -84/-90 in the least common terms?

abruzzese [7]

Answer: 14/15

This is because to get to 14/15 you must divide by 6 but when getting to 42/45 you must divide 2. Therefore 14/15 is your answer because the problem went to the most reduced fraction.

5 0

2 years ago