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tekilochka [14]
3 years ago
5

Are 2,3,4,5,6,9,10 divisble by 3​

Mathematics
2 answers:
babunello [35]3 years ago
8 0
No, only 3, 6, and 9 are divisible by 3 because 3 x 1= 3, 3 x 2= 6, 3 x 3= 9. Hope this helps
Goshia [24]3 years ago
7 0
Only 3,6 & 9 are unless a decimal point is accepted.
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A company decided to test the hypothesis that the average time a company’s employees are spending to check their private e-mails
Degger [83]

Answer:

z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232    

Since is a one sided right tailed test the p value would be:  

p_v =P(z>2.232)=0.0128  

Step-by-step explanation:

Data given and notation  

\bar X=6.6 represent the sample mean

\sigma=1.7 represent the population standard deviation

n=40 sample size  

\mu_o =6 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is higher than 6minutes or no, the system of hypothesis would be:  

Null hypothesis:\mu \leq 6  

Alternative hypothesis:\mu > 6  

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232    

P-value

Since is a one sided right tailed test the p value would be:  

p_v =P(z>2.232)=0.0128  

5 0
3 years ago
A palindrome is a string whose reversal is identical to the string. How many bit strings of length n are palindromes?
alisha [4.7K]

Answer:

The number of  palindromes is  

      2^{\frac{n}{2} } when n is even and

      2^{\frac{n +1}{2}  } when n is odd

Step-by-step explanation:

From the question we are told that

    The  length of the string is  n

Generally palindrome is evaluated by considering the first part of a string

  When the the length of the string is an even number then

it means that the first part of the string is \frac{n}{2}

Hence the number of  bit strings of length n that are  palindromes is evaluated as

       p(n_{even }) =  2^{\frac{n}{2} }

But When the the length of the string is an odd number then

it means that the first part of the string is \frac{n-1}{2}

Hence the number of  bit strings of length n that are  palindromes is evaluated as

       p(n_{odd }) =2^{\frac{n -1}{2} +1 } = 2^{\frac{n +1}{2}  }

Generally each bit could be either 0 or  1

Hence the number of  palindromes is  

      2^{\frac{n}{2} } when n is even and

      2^{\frac{n +1}{2}  }  when n is odd

           

4 0
3 years ago
Pleaseeeee helppppppppppppp
Paul [167]

Answer:

striped

Step-by-step explanation:

8 0
2 years ago
Farmer Ed has 150 meters of fencing and wants to enclose a rectangular play that borders a river. If farmer Ed does not fence in
dexar [7]
150/3=50

50^2=2500m^2=largest area
7 0
3 years ago
Read 2 more answers
How do you solve the quadratic equation x2-7=0
12345 [234]
X^2-7=0
Add 7 to both sides.
x^2=7
Find the sqr root of 7.
It's about 2.6
5 0
3 years ago
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