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3 years ago

Find the sum of the summation of 3 i plus 2, from i equals 5 to 13.

Mathematics

2 answers:

lina2011 [118]3 years ago

7 0

The answer is 261 C I just took the asignment

leva [86]3 years ago

4 0

Answer:

(A) 261

Step-by-step explanation:

We have to find the sum of summation of 3i+2 from i equals 5 to 13, that is

$\sum_{i=5}^{13}(3i+2)$

= $3(5)+2+3(6)+2+3(7)+2+3(8)+2+3(9)+2+3(10)+2+3(11)+2+3(12)+2+3(13)+2$

= $17+20+23+26+29+32+35+38+41$

= $261$

Thus, the sum of summation of 3i+2 from i equals 5 to 13 is 261.

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The perimeter of a rectangle must be less than 170170 feet. If the length is known to be 4444 feet, find the range of possible w

katrin [286]

Answer:

$w \in (0,41)$

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Step-by-step explanation:

We are given the following in the question:

The perimeter of a rectangle must be less than 170 feet.

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3 years ago

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user100 [1]

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3 years ago

In a manufacturing plant that produces new computers, a 0.15 probability exists that a computer will be defective. if five compu

Sindrei [870]

The probability that all of them will be defective is 0.0000759375

Explanation

The general Binomial Probability formula is....

$P= ^nC_{r}*p^r*(1-p)^n^-^r$ , where p is the probability of success, n is the total number of trials and r is the desired numbers of trials.

Given, the probability that a computer will be defective is 0.15 , so p = 0.15

Five computers are manufactured and we need to find the probability that all of them will be defective. That means, n = 5 and r = 5

Now according to the above formula....

$P= ^5C_{5}*(0.15)^5*(1-0.15)^5^-^5 \\ \\ P= 1*(0.15)^5* (0.85)^0\\ \\ P=(0.15)^5 =0.0000759375$

So, the probability that all of them will be defective is 0.0000759375

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3 years ago