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vazorg [7]
4 years ago
11

Un campanario tarda 4s en tocar 5 campanadas , ¿Cuanto tardara en tocar 10 campanadas?

Mathematics
1 answer:
abruzzese [7]4 years ago
6 0

¿Cuanto tardara en tocar 10 campanadas?

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A sample of 20 account balances of a credit company showed an average balance of $1,170 and a standard deviation of $125. You wa
Lady_Fox [76]

Answer:

The P-value for this test is P=0.2415.

Step-by-step explanation:

We have to perform an hypothesis testing on the mean of alla account balances.

The claim is that the mean of all account balances is significantly greater than $1,150.

Then, the null and alternative hypothesis are:

H_0: \mu=1150\\\\H_a: \mu>1150

The sample size is n=20, with a sample mean is 110 and standard deviation is 125.

We can calculate the t-statistic as:

t=\dfrac{\bar x-\mu}{s/\sqrt{n}}=\dfrac{1170-1150}{125/\sqrt{20}}=\dfrac{20}{27.95}=0.7156

The degrees of freedom fot this test are:

df=n-1=20-1=19

For this one-tailed test and 19 degrees of freedom, the P-value is:

P-value=P(t>0.7156)=0.2415

8 0
4 years ago
5x - y ÷ 8 when x = 5 and y = 8
stiks02 [169]

Answer:

24

Step-by-step explanation:

5x - y ÷ 8

Let x=5 and y=8

5(5) -8÷8

PEMDAS

multiply and divide from left to right

25 -8÷8

25 -1

Then add and subtract

24

6 0
3 years ago
Read 2 more answers
What does 7m- m equal
Norma-Jean [14]
7m-m\rightarrow7m-1m=m(7-1)\rightarrow6m

7m-m is equal to 6m.

4 0
1 year ago
Kim purchased white vases, red vases, and flowers to create centerpieces for an event. The flowers cost a total of $336 and each
laiz [17]

Option A:

I and III only the answers.

Solution:

Let white vases be "w" and red vases be "r".

Cost of total flower = $336

Cost of each vase = $11

Total cost of the centerpieces

                = Cost of (white vases + red vases)  + Cost of flowers

                = 11(w + r) + 336

                = 11w + 11r + 336

Total cost of the centerpieces = 11w + 11r + 336 = 11(w + r) + 336

Therefore I and III only the answers.

Option A is the correct answer.

4 0
3 years ago
What is the answer does this problem
Lapatulllka [165]
The first letter or word is not there
3 0
3 years ago
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