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4vir4ik [10]
3 years ago
5

Find the sum of the series -11 - 3 + 5 + 13 + ... + 125 using the series formula.

Mathematics
2 answers:
Nana76 [90]3 years ago
6 0

Answer: 1026

Step-by-step explanation:

Volgvan3 years ago
3 0

Answer:

1026

Step-by-step explanation:

Common difference = d = 2nd term  - first term

 d = -3 - (-11) = -3 +11 = 8

First term = a = -11

First we need to find the number of terms in this series

a_{n} = 125\\\\a + (n- 1)d = a_{n}\\\\

-11 + (n- 1) * 8 = 125

 (n-1)*8 = 125 + 11

 (n-1) * 8 = 136

n -1 = 136/8

n -1 = 17

  n = 17+1

 n = 18

S_{n} =\frac{n}{2}(a+a_{n})\\\\S_{18} =\frac{18}{2}(-11+125)\\\\

   = 9 * 114

   = 1026

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Answer:

The probability distribution of the number of customers that enter the store on a given day is:

P(x=k)=\frac{57^ke^{-57}}{k!}

Step-by-step explanation:

To calculate a parameter for the given day, we have to calculate what is the average arrival rate for the day.

This can be done with the data given:

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P(x=k)=\frac{57^ke^{-57}}{k!}

5 0
3 years ago
Round 5.456 to the nearest tenth.​
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Step-by-step explanation:

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Thank you so much. (20 characters required)
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#3.
 √18²-5.7²    Second Choice

#4
l²=5²+4² = 25+16 = = 41
l=√41
l= 6.4

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3 years ago
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