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3 years ago

Name each polygon, tell whether its a regular polygon or nat a regular polygon

Mathematics

2 answers:

VladimirAG [237]3 years ago

7 0

That polygon is a not regular polygon because for it to be a regular polygon it has to have all the sides equal in length and equal angles.BTW WHEN UR LEARNING ABOUT POLYGONS INSTEAD OF USING THE WORD EQUAL U CAN USE CONGRUENT.

abruzzese [7]3 years ago

5 0

Polygon not a polygon

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Tarzan (whose mass is 90.0 kg) plans to swing down, startingfrom rest, from a ledge using a light vine 7.4 m long. He holdsone e

Rainbow [258]

Answer:

2.73 seconds

Step-by-step explanation:

The period in seconds of a simple pendulum is given by the formula ...

$T=2\pi\sqrt{\dfrac{L}{g}}=2\pi\sqrt{\dfrac{7.4}{9.8}}\approx 5.46$

After missing his first drop, Tarzan will have to wait 1/2 period before the next opportunity. He will reach the lowest point again 2.73 seconds after passing it the first time.

3 0

3 years ago

The distance between two cities on a map is 2 inches. The map scale is 1/4 inch = 5 miles. What is the actual distance between t

MA_775_DIABLO [31]

Answer: The actual distance is 40 miles.

Step-by-step explanation:

First, it’s always easier for the first unit to be 1, so it’s easier to convert. To do get one from 1/4, you would multiply by 4.

1/4 x 4 = 1

However, we all know that if you do something to one side, you must do it to the other side, so we multiply 5 by 4.

5 x 4 = 20.

Your equation know looks like this:

1 inch = 20 miles.

Now, we just multiply both sides by 2, since that the amount of inches we need.

1 x 2 inches = 20 x 2 miles

2 inches = 40 miles

Therefore, the actual distance is 40 miles.

3 0

3 years ago

The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has under

umka2103 [35]

Answer:

1. Option A) Reject the null hypothesis

2. Option B) 0.0062

Step-by-step explanation:

We are given the following in the question:

1. Population mean, μ = $1.25 per liter

Sample mean, $\bar{x}$ = $1.20 per lite

Sample size, n = 49

Alpha, α = 0.05

Population standard deviation, σ = $0.14

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 1.25\text{ dollars per liter}\\H_A: \mu < 1.25\text{ dollars per liter}$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{1.20 - 1.25}{\frac{0.14}{\sqrt{49}}}= -2.5$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Option A) Reject the null hypothesis

Thus, there is enough evidence to support the claim that efficiency measures have reduced the prices.

2. We can calculate the p value from the standard table.

P-value = 0.0062

Option B) 0.0062

4 0

3 years ago

Help pls with this too

scoundrel [369]

It’s 6 just count the x’s after 55

7 0

3 years ago

Read 2 more answers

U have 10 batteries sitting on your desk, three of which are dead. You choose 2 batteries are random for you calculator. What is

Nesterboy [21]

You have to calculate the expected value of pulling any number of good batteries.
There are 3 bad batteries (B) and seven good batteries (G)
If you pull two batteries the possible number of good batteries you can get are 0, 1 and 2.
GB, BG, GG, and BB
two chances for getting 1, one chance for getting two, and one chance for getting zero.
In order to calculate the expected value you have to first calculate the values of all the possibilities.
(GB = 7/10 x 3/10) (BG = 3/10 x 7/10) (GG = 7/10 x 7/10) (BB = 3/10 x 3/10)
Then take these answers and multiply them by the number of good batteries they each contain and add. (GB is 1 good battery, GG is two, etc.)
1(.21) + 1(.21) + 2(.49) + 0(.09)
The result is 1.4
The expected value of good batteries is 1.4

3 0

3 years ago