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Assoli18 [71]
2 years ago
14

What percent of 30 is 13

Mathematics
1 answer:
Rom4ik [11]2 years ago
8 0

Answer:3.9

Step-by-step explanation:

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Help please? And show work?
In-s [12.5K]
Answer the answer is 25




Explanation:
6 0
3 years ago
Is 6 a factor of the number 81?
Vikki [24]
No it is not. The factors of 81 are 1,3,9,27...
4 0
3 years ago
A company is manufacturing highway emergency ares. Such ares are sup- posed to burn for an average of 20 minutes. Every hour a s
kramer

Complete question :

A company is manufacturing highway emergency ares. Such ares are sup- posed to burn for an average of 20 minutes. Every hour a sample of ares is collected, and their average burn time is determined. If the manufacturing process is working cor- rectly, there is a 68% chance that the average burn time of the sample will be between 14 minutes and 26 minutes. The quality engineer in charge of the process believes that if 4 of 5 samples fall outside these bounds then this is a signal that the process might not be performing as expected. Each morning the sampling begins anew. Let X denote the number of samples drawn in order to obtain the fourth sample whose average value is outside of the above bounds. Find the probability that for a given morning X = 5, hence there seems to be a problem right away.

Answer:

0.0285

Step-by-step explanation:

We are to find the probability for a given morning that X = 5

From the question, we could see that there is a 68% chance that the average burn time of the sample will be between 14 minutes and 26 minutes and the success of the process is obtained after the fourth or fifth sample.

Thus, r = 4; q = 0.68

The probability average burn time falls outside p will be:

p = 1 - 0.68 = 0.32

The random variable X follows negative binomial distribution.

Therefore,

f(x) = \left[\begin{array}{ccc}x-1\\r-1\end{array}\right] (1-p)^x^-^r) (p)^r

Where, x = 5

r = 4

p = 0.32

Substituting figures in the equation, we have:

P(x=5) = \left[\begin{array}{ccc}5-1\\4-1\end{array}\right] (1-0.32)^5^-^4 (0.32)^4

P(x=5) = \left[\begin{array}{ccc}4\\3\end{array}\right] (0.68)(0.01048576)

= 0.0285

The probability that for a given morning X = 5 is 0.0285

4 0
3 years ago
Which situation has a unit rate of 4?
Mkey [24]

Answer:

The answer is C

Step-by-step explanation:

C. A gardener harvested 20 tomatoes from 5 plants.

20tomatoes/5plants=4

4 0
2 years ago
Help please ?????? I don't understand
Stells [14]

Answer:

It's going up by a difference of 70, & 2.

Step-by-step explanation:

4 0
3 years ago
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