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3 years ago

Helppp me please please ??

Mathematics

2 answers:

morpeh [17]3 years ago

8 0

Add together 12% and 15%, obtaining 27%.

Then the central angle, in radians, is 0.27(2*pi)= 0.54*pi (answer)

Lynna [10]3 years ago

4 0

To answer your question the measure of the central angle for corn and green beans together would be
12%+15%=27%

hope this helps

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An airplane took 2 hours to fly 600 km against a head wind. The retrun trip with the wind took 1 and two thirds hours. Find the

Agata [3.3K]

Answer:

The speed of plane in still air is 330 kmph

Step-by-step explanation:

Given as :

The distance cover against the wind = 600 km

The time taken against the wind = 2 hours

The distance cover with the wind = 600 km

The time taken with the wind = ( 1 + $\frac{2}{3}$ ) hours

= $\frac{5}{3}$ hours

Let The speed against the wind = x - y kmph

The speed with the wind = x + y kmph

where x is the speed of plane in still air

And y is the speed of wind

So , Speed = $\dfrac{\texrm Distance}{\texrm Time}$

Or, x - y = $\frac{600}{2}$ = 300 ......A

And x + y = $\frac{600}{\frac{5}{3} }$

Or , x + y = 360 .......B

From eq A and B

( x + y ) - ( x - y ) = 360 - 300

Or, 2 y = 60

∴ y = $\frac{60}{2}$ = 30 kmph

And x = 360 - 30 = 330 kmph

Hence The speed of plane in still air is 330 kmph Answer

3 0

3 years ago

What is the volume of the cylinder?

Lunna [17]

It would probably 144 I did and that’s what I got

3 0

3 years ago

Read 2 more answers

What is the distance between 1st and 3rd base?

Leni [432]

180 hhhhhhhhhaaaaaaa

3 0

3 years ago

Based on the side lengths given (a, b, and o, which triangles are right triangles?

Cloud [144]

Answer:

2 & 3

Step-by-step explanation:

Pythagorean Theorem is $a^2+b^2=c^2$ .

If the values given in each option satisfy the theorem, the sides will make a right triangle.

<h3>For Option One:</h3>

$4^2+6^2=8^2\\=> 4^2=16\\=> 6^2=36\\=>8^2 =64\\16+36=64\\\boxed{52\neq 64}$

The sides would not make a right triangle.

<h3>For Option Two:</h3>

$6^2+8^2=10^2\\=> 6^2 = 36\\=> 8^2=64\\=> 10^2=100\\36+64=100\\\boxed{100=100}$

The sides would make a right triangle.

<h3>For Option Three:</h3>

$5^2+6^2=\sqrt{61}^2\\ => 5^2=25\\=>6^2=36\\=>\sqrt{61}^2=61\\ 25+36=61\\\boxed {61=61}$

The sides would make a right triangle.

<h3>For Option Four:</h3>

$6^2+9^2=12^2\\=> 6^2=36\\=>9^2=81\\=>12^2=144\\36+81=144\\\boxed{117\neq 144}$

The sides would not make a right triangle.

The correct answer should be options two and three.

6 0

3 years ago

Questions 2-7 will all be in regards to this data set:Observation X Y1 20 302 23 353 28 404 26 385 24 376 32 457 35 508 24 349 3

Tomtit [17]

Answer:

r =0.4437

Step-by-step explanation:

We have the follwoing dataset:

X: 20,23,53,4,24,32,35,24,31,23

Y: 30,35,40,38,37,45,50,34,42,32

n=10

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=10 $\sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007$

Th excel figure attached shows the calculations for each sum.

$r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437$

So then the correlation coefficient would be r =0.4437

3 0

4 years ago