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Naya [18.7K]
3 years ago
9

28/7 in decimal form?

Mathematics
2 answers:
lianna [129]3 years ago
4 0
The answer is 4, which is an integer
Lyrx [107]3 years ago
4 0

Answer:

its just 4 theirs not a decimal

Step-by-step explanation:

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A farmer divides 20 acres of land into 1/4 acre sections. Into how many sections does the farmer divide her land?
kondor19780726 [428]
I believe the answer i 5 because 20 x 1/4 = 5
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3 years ago
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Now Jim was a dreamer, but he was a thinker, too. And he thought one day that if he let his owner meet the cooter, he might get
natita [175]

Answer:

the answer is b an enslaved man believes a talking cooter will help him gain his freed

Step-by-step explanation:

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3 years ago
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The lifetime of a cheap light bulb is an exponential random variable with mean 36 hours. Suppose that 16 light bulbs are tested
photoshop1234 [79]

Answer:

P(T

Step-by-step explanation:

Previous concepts

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

The exponential distribution is "the probability distribution of the time between events in a Poisson process (a process in which events occur continuously and independently at a constant average rate). It is a particular case of the gamma distribution". The probability density function is given by:

P(X=x)=\lambda e^{-\lambda x}, x>0

And 0 for other case. Let X the random variable that represent "The number of years a radio functions" and we know that the distribution is given by:

X \sim Exp(\lambda=\frac{1}{16})

Or equivalently:

X \sim Exp(\mu=16)

Solution to the problem

For this case we are interested in the total T, and we can find the mean and deviation for this like this:

\bar X =\frac{\sum_{i=1}^n X_i}{n}=\frac{T}{n}

If we solve for T we got:

T= n\bar X

And the expected value is given by:

E(T) = n E(\bar X)= n \mu= 16*36=576

And we can find the variance like this:

Var(T) = Var(n\bar X)=n^2 Var(\bar X)= n^2 *\frac{\sigma^2}{n}=n \sigma^2

And then the deviation is given by:

Sd(T)= \sqrt{n} \sigma=\sqrt{16} *36=144

And the distribution for the total is:

T\sim N(n\mu, \sqrt{n}\sigma)

And we want to find this probability:

P(T< 600)

And we can use the z score formula given by:

z=\frac{T- \mu_T}{\sigma_T}

And replacing we got this:

P(T

6 0
3 years ago
I got X + 3, but it was marked incorrect. Anyone have the answer or advice on how to solve this? :)
crimeas [40]
The answer is x+3/(x+7)(x-7)
3 0
3 years ago
4 divided by 5/9. Please answer in fraction form.
irina1246 [14]

Answer: 20/9

Step-by-step explanation:

Turn 4 into a fraction so 4/1

When dividing, flip the second fraction over then multiply them both, so

4/1 x 5/9

That is 4 x 5 / 1 x 9

Which is 20/9

4 0
3 years ago
Read 2 more answers
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