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frosja888 [35]
3 years ago
6

Is -2/3 rational or irrational

Mathematics
2 answers:
yan [13]3 years ago
7 0

Answer: I think its Rational -_-

Step-by-step explanation: Chili Dogs

weqwewe [10]3 years ago
3 0

Answer:

rational, this fraction is not continuous, like pi

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A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measurin
Ratling [72]

Answer:

The standard deviation of weight for this species of cockroaches is 4.62.

Step-by-step explanation:

Given : A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

To find : What is the approximate standard deviation of weight for this species of cockroaches?

Solution :

We have given,

Mean \mu=50

The sample mean x=55

A lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

i.e. P(X>55)=14%=0.14

The total probability needs to sum up to 1,

P(X\leq 55)=1-P(X>55)

P(X\leq 55)=1-0.14

P(X\leq 55)=0.86

The z-score value of 0.86 using z-score table is z=1.08.

Applying z-score formula,

z=\frac{x-\mu}{\sigma}

Where, \sigma is standard deviation

Substitute the values,

z=\frac{x-\mu}{\sigma}

1.08=\frac{55-50}{\sigma}

1.08=\frac{5}{\sigma}

\sigma=\frac{5}{1.08}

\sigma=4.62

The standard deviation of weight for this species of cockroaches is 4.62.

4 0
3 years ago
Round 38562.7 to 1 significant figure
MissTica
= 488000
(real number)

= 4.88 × 105
(scientific notation)

<span>= 4.88e5 


maybe this will help ?</span>
6 0
3 years ago
Read 2 more answers
RIGHT ANSWER WILL RECEIVE BRANLIEST, FIVE STARS, AND A THANKS
LekaFEV [45]

Answer:

See below.

Step-by-step explanation:

An outlier can affect the mean by a lot.  For example, if my neighbor moves out and Bill Gates moves in (he would be a <u>super</u> outlier!), the mean annual income would increase enormously.

The median, on the other hand, would not change at all.  The income in the middle is still the income in the middle; Gates' income would not budge the median.

8 0
2 years ago
Rectangles Are a subset of which set
Slav-nsk [51]
They are a subset to squares
4 0
3 years ago
What is the imaginary part of the number 9?​
KengaRu [80]

Answer:

<h2>0i</h2>

Step-by-step explanation:

The imaginary number has form:

<em>a + bi</em>

<em>a</em><em> - real part</em>

<em>bi</em><em> - imaginary part</em>

<em>i</em><em> - imaginary unit (i = √-1)</em>

We have the number 9.

<em>9</em><em> is a real part</em>

An imaginary part is equal 0.

Therefore the imaginary part of number 9 is 0i.

4 0
3 years ago
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