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natta225 [31]
3 years ago
5

Assessment items What is the smallest angle of rotational symmetry that maps a regular pentagon onto itself?

Mathematics
2 answers:
Romashka-Z-Leto [24]3 years ago
5 0

A regular pentagon has 5 vertices.  360°/5 = 72°

Answer: 72°

ycow [4]3 years ago
5 0

Answer:

72°

Step-by-step explanation:

done the topic

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4 X 10⁴) + (6 x 10²)​
Ksenya-84 [330]

Answer:40,600

Step-by-step explanation:

10x10x10x10=10,000

10x10=100

4x10,000+6x100

40,000+600=

40,600

4 0
3 years ago
Read 2 more answers
A recent Gallup poll found that 36% of U.S. teens aged from 13 to 17 years old have a computer with [(6)] Internet access in the
In-s [12.5K]

Answer:

Step-by-step explanation:

a) The population parameter is the population proportion.

b) Confidence interval is written as

Sample proportion ± margin of error

Margin of error = z × √pq/n

Where

z represents the z score corresponding to the confidence level

p = sample proportion. It also means probability of success

q = probability of failure

q = 1 - p

p = x/n

Where

n represents the number of samples

x represents the number of success

From the information given,

n = 1028

p = 36/100 = 0.36

q = 1 - 0.36 = 0.64

To determine the z score, we subtract the confidence level from 100% to get α

α = 1 - 0.99 = 0.1

α/2 = 0.01/2 = 0.005

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.05 = 0.995

The z score corresponding to the area on the z table is 2.58. Thus, confidence level of 99% is 2.58

Therefore, the 99% confidence interval is

0.36 ± 2.58 × √(0.36)(0.64)/1028

The lower limit of the confidence interval is

0.36 - 0.039 = 0.321

The upper limit of the confidence interval is

0.36 + 0.039 = 0.399

Therefore, with 99% confidence interval, the proportion of U.S. teens aged from 13 to 17 years old that have a computer with Internet access in their rooms is between 0.321 and 0.399

c) for a margin of error of 1%, that is 1/100 = 0.01, then

0.01 = 2.58 × √(0.36)(0.64)/n

0.01/2.58 = √0.2304/n

0.00387596899 = √0.2304/n

Square both sides

0.00001502314 = 0.2304/n

n = 0.2304/0.00001502314

n = 15336

5 0
3 years ago
I need help with this
Ede4ka [16]
I Can't See The Problem All The Way
4 0
3 years ago
[98 POINTS]<br><br> Explain how you would calculate the volume of the figure shown.<br> Be detailed.
N76 [4]

Answer:

1282.81824016

Step-by-step explanation:

Find the volume of the cone (the formula is π×r²×h/3) and the volume is 359.19

Now find the volume of the cylinder which is 923.6282401554 and we just add them together which is 1282.81824016

8 0
3 years ago
Read 2 more answers
Find the value of x.<br> A. 80°<br> B. 70°<br> C. 60°<br> D. 50°
borishaifa [10]

Answer:

A

Step-by-step explanation:

80 degree becaue a triangle = 180 degress

180 - 100 = 80

7 0
2 years ago
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