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Valentin [98]
2 years ago
5

Help meeee Is 2.127 rational or irrational? I WILL GIVE BRAINLIEST HURRY

Mathematics
1 answer:
Bezzdna [24]2 years ago
4 0

Answer:

irrational number now gave me brainliest

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The measure of each exterior angle of a regular 30-gon is
dezoksy [38]

Answer:

12°

Step-by-step explanation:

So, for your 30-gon, the interior angles total up to (30-2) * 180 = 5040.   Each interior angle is that total divided by the number of interior angles, or 5040/30 = 168º:

 

<u>The measure of each exterior angle is the total divided by the number of angles, or 360/30 = 12º.</u>

4 0
2 years ago
How to make 9/7 to a simplified fraction?
Leviafan [203]

Divide 7 by 9 and you’ll get your answer in a calculator

8 0
3 years ago
Direct mail advertisers send solicitations​ ("junk mail") to thousands of potential customers in the hope that some will buy the
harina [27]

Answer:

The interval is (.0817, .118).

Step-by-step explanation:

Let's make this interval! The easy way is to go to STAT->TEST->A, 1-prop z-int, but I will show the long way.

<u>1. Conditions</u>

First we must check the conditions.

<em>Randomization condition: </em>The sample is given to be random, so we can assume independence.

<em>Success/failure condition: </em>Both np>10 and nq>10 must be met.

  • np = 1030(103/1030) = 103 ✓
  • nq = 1030(927/1030) = 927 ✓

<em>10% condition: </em>The sample cannot be greater than 10% of the population.

  • 10n < N, 10(1030) < 200000 ✓

All conditions are met, so we can use <u>a 1-proportion z-interval</u> to represent the data.

<u></u>

<u>2. Mechanics</u>

<u>Find </u>\hat{p}<u>, the sample proportion.</u>

103/1030 = .1

\hat{q}, then, the probability of not p, is 1 - .1 = .9

<u>Find z* (z star), the critical z-value.</u>

You can do this on your calculator using 2nd->VARS->3 (or you can memorize it - it's 1.96. Winky face.) This is called the invNorm function, that takes the left side area under the normal curve. But what do we plug in to the invNorm function?

invNorm(.975) = 1.96

<u>Plug values into the equation.</u>

\hat{p} ± z*\sqrt{\frac{\hat{p}\hat{q}}{n} }

.1 ± 1.96\sqrt{\frac{.1*.9}{1030} }

.1 ± 1.96(.00935)

.1 - .0183 = .0817

.1 + .0183 = .118

(.0817, .118)

<u>3. Conclusion</u>

Based on this sample, we are 95% confident that the proportion of people the company contacts who may buy something is between .0817 and .118. That isn't very likely, but maybe they'll make a little profit!

5 0
3 years ago
Refer to the figure below to complete the following item.
Dmitrij [34]

Answer:

160

Step-by-step explanation:

5 0
3 years ago
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This is the last one I just really need help I am slow
Hatshy [7]

Answer:

sorry for the late response it's c224

4 0
2 years ago
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