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lianna [129]
2 years ago
8

Plz help I need help

Mathematics
1 answer:
Mrac [35]2 years ago
3 0

Answer:

What do you need help with mate?

Step-by-step explanation:

you don't have a question posted.

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| 3x | = 9 <br> | -3r | = 9 <br> b/5 = 1
Ierofanga [76]
|3x| = 9
|3x| = ±9
|3x| = 9    U    |3x| = -9
  3x = 9     U     3x = -9
   3     3              3      3
    x = 3               x = -3

|-3r| = 9
|-3r| = ±9
|-3r| = 9    U    |-3r| = -9
   3r = 9      U     3r = -9
    3    3               3     3
    r = 3                 r = -3

     ¹/₅b = 1
5(¹/₅b) = 5(1)
       b = 5
8 0
3 years ago
Current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean of 49 day
zimovet [89]

Answer:

The probability that a simple random sample of 64 protozoa will have a mean life expectancy of 54 or more days is P(M>54)=0.00004.

Step-by-step explanation:

In this case, we have a population lifetime normally distributed with mean 49 and standard deviation 10.2.

We take a sample of size n=64.

Then, we can calculate the z-score for a sample mean M=54, in order to calculate P(M>54):

z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{54-49}{10.2/\sqrt{64}}=\dfrac{5}{1.275}=3.922\\\\\\P(M>54)=P(z>3.922)=0.00004

The probability that a simple random sample of 64 protozoa will have a mean life expectancy of 54 or more days is P(M>54)=0.00004.

3 0
2 years ago
Solve 5|x – 4| ≥ –10
Nataly_w [17]

Answer:

This question doesn't have a solution

Step-by-step explanation:

7 0
3 years ago
(15 points) please please help me
Nataliya [291]
It is D because there are 1,800 seconds in 30 mins so 1,800 * 6 = 10,800
7 0
3 years ago
Read 2 more answers
Which expression can be used to convert 22 Australian dollars to US dollars?
puteri [66]

Answer:

The answer is B

Step-by-step explanation:

B

8 0
2 years ago
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