27 solid iron spheres each of radius x cm are melted to form a sphere with radius y cm,find the ratio of x:.

Answers

Answer 1

Answer:

Radius of 1 solid iron sphere =r

⇒Volume =34πr3

⇒Volume of 27 solid iron spheres =27×34πr3

⇒34πr′3=27×34πr3

r′3=2πr3

⇒r′=3r

(ii) Surface area =4πr2

SA r′=4πr′2

=4π(3r)2=36πr2

S′S=36πr24πr2=91=1:9


Related Questions

Kyleigh put a large rectangular sticker on her notebook. The height of the sticker measures 14 centimeters. The base is half as long as the height.

What area of the notebook does the sticker cover?

Answers

Answer:

The answer is 98 square cm

Step-by-step explanation:

14/2=7

14*7=98

Name a pair of vertical angles in the figure.

Answers

Answer:

1 and 3

Step-by-step explanation:

vertical angles are opposite to each other when angles are created by intersecting lines.

Answer:

1 and 3 our the only vertical angles in this picture HOPE THAT HELPS!

lollyjejejewjejejejejjejejejejje
jejejenenenenenenenjejej jjjjjjjjhjuuhh

errkekdkd​

Answers

Answer:

jdbdjdbdjdbdhx

Step-by-step explanation:

bd djd dhdbf

The price of an item has been reduced by 80%. The original price was $60. What is the price of the item now?

Answers

The price of the item is now $12

Answer:

48

Step-by-step explanation:

Simplify 80% to 0.8

Simplify=48

We could find the price of the item now by multiplying 80% by 60.

I need answer Immediately pls!!!!!!

Answers

Answer:

1/3

Step-by-step explanation:

Total number of people who play sports in the Algebra 2 class:

[tex]21 - 9 = 12[/tex]

If there are 10 students who play Basketball, there are 2 students who ONLY play Baseball. If there are 9 students who play Baseball, there are 3 students who ONLY play Basketball.

So the number of students who play BOTH sports is:

[tex]12 - 2 - 3 = 12 - 5 = 7[/tex]

If 7 from the 21 Algebra 2 class students play BOTH sports, the probability is:

[tex]P = \frac{7}{21} = \frac{1}{3}[/tex]

the answer is 1/3. ooga

5/11x6/7 = 5/14.........................................

Answers

If it’s asking if it’s true of false it’s false
Because 5/11x6/7 =30/77

Answer:

[tex]5 \div 11 \times 6 \div 7 = \frac{30}{77} [/tex]

If P( 9,r ) = 3,024, what is r ?

plz plz plz... help mè

I mark it... :(​

Answers

Answer:

[tex] \frac{9i}{(9 - r)i} = 3024 \\ (9 - r)i = 9i \div 3024 = 362880 \div 3024 = 120 = \\ = 1 \times 2 \times 3 \times 4 \times 5 = 5i \\ r = 4[/tex]

Gallup is a company that carries out daily opinion polls on a variety of topics. In a recent daily poll of 1{,}0001,0001, comma, 000 randomly selected US adults, 334334334 said they were engaged at work.
Based on this sample, which of the following is a 90\%90%90, percent confidence interval for the proportion of all US adults who would say they are engaged at work?
Choose 1 answer:
Choose 1 answer:

Answers

Answer:

c

Step-by-step explanation:

Khan Academy

Answer:

(0.309,0.359)

Step-by-step explanation:

Did I do it right? If I didn't, Can u please explain why and give me the correct answer please?

Answers

Yes u did
5/24=0.21
And 6/24 x200=50
I think u right

Answer:

Step-by-step explanation:

1) find the total of candies

3 + 6 + 5 + 2 + 8 = 24

2) divide the number of yellow candies  for the total amount of candies

5/24 = 0.21 (correct)

3) use a proportion

6 : 24 = x : 200

x = (200 *6) / 24 = 50 (correct)

The grade distribution for students in the introductory statistics class at a local community college are displayed in the table. In this table, A = 4, B = 3, etc. Let X represent the grade for a randomly selected student.

A 2-column table with 5 rows. Column 1 is labeled grade with entries 4, 3, 2, 1, 0. Column 2 is labeled probability with entries 0.43, 0.31, 0.17, 0.05, 0.04.

What is the probability that a randomly selected student earned a C or better?

0.17
0.26
0.48
0.91

Answers

Considering the given discrete distribution, it is found that the probability that a randomly selected student earned a C or better is of 0.91.

What does the discrete probability distribution gives?

It gives the probability of each grade, as follows:

P(X = A) = 0.43.P(X = B) = 0.31.P(X = C) = 0.17.P(X = D) = 0.05.P(X = E) = 0.04.

Hence, the probability of a grade of C or better is given by:

[tex]P(X \geq C) = P(X = A) + P(X = B) + P(X = C) = 0.43 + 0.31 + 0.17 = 0.91[/tex]

More can be learned about discrete probability distributions at https://brainly.com/question/24802582

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freeeeeepointssssssss​

Answers

Answer:

thank uuuu

Step-by-step explanation:

Answer:

OMG FREE SLOT!

Step-by-step explanation:

HAZAAAAAAAAAAAAAAAA

calculate the following showing populations the temperature in Johannesburg was 15° it drastically decreased by 17 °c what is the temperature now​

Answers

Answer:

-2 degrees Celsius.

Step-by-step explanation:

15 - 17 = -2

The answer is -2 fooo

did I get it right????

Answers

Answer:

The answer is actually 105 m squared

Step-by-step explanation:

The area of a rectangle is the length times the width

The length is 7 and width is 15

7 x 15 = 105

Answer:

area of rectangle =l×b

7×15105m²

hope it helps.

(x+1)^2 = -4
What are the solutions?

Answers

Answer:

x = 4i - 1 or

x = 4i + 1

Step-by-step explanation:

(x+1)^2 = -4

x+1 = (+-)4i

x = +-4i - 1

==>

x = 4i - 1 or

x = 4i + 1

Need help I'll give branlist plzzzz

Answers

A) A circle if it’s cut parallel to the base
B) The formula of a cylinder is pi r^2

π(7)^2
Area= 49 π

what is the slope line perpendicular to the equation 4x+3y=9

Answers

Answer:

m=3/4

Step-by-step explanation:

first, let's put the line 4x+3y=9 from standard form (ax+by=c) into slope-intercept form (y=mx+b)

we have the equation 4x+3y=9

subtract 4x from both sides

3y=-4x+9

divide by 3

y=-4/3x+3

perpendicular lines have slopes that are negative and reciprocal. If the slopes are multiplied together, the result is -1

so to find the slope of the line perpendicular to the line y=-4/3x+3, we can take the slope of y=-4/3x+3 (-4/3) multiply it by a variable (this is our unknown value), and have that set to -1

(m is the slope value)

-4/3m=-1

multiply by -3/4

m=3/4

therefore the slope of the perpendicular line is 3/4

hope this helps!! :)

Find the distance between the points

Answers

Answer:

12 hope this help

Step-by-step explanation:

The answer is 12 ,you have to count down from point B(-10,3) to point A (-10,-9)

HELP!!What is the volume of the rectangular prism?
2 inches
8 inches
4 inches
A
14 cubic inches
B
112 cubic inches
164 cubic inches
64 cubic inches

Answers

Answer:

64 cubic inches

Step-by-step explanation:

The formula to find the volume of a rectangular prism is

Length x Width x Height

Therefore, 2 x 8 x 4 = 64.

a polygon has its vertices at the following points.
(2,5), (4,7), (7,7) and (9,5) what is the name of this polygon?

can u guys please stop giving links fr i need help on this

Answers

Answer:

isosceles trapezoid

Step-by-step explanation:

1) find the distance of the points

[tex]\sqrt{(x2-x1)^2 + (y2 -y1)^2}[/tex]

AB = [tex]\sqrt{(4-2)^2 + (7-5)^2} = \sqrt{4 + 4} = \sqrt{8} = 2 \sqrt{2}[/tex]

BC = |7-4| = 3

CD = [tex]\sqrt{(9-7)^2 + (5-7)^2}= \sqrt{4+4} = \sqrt{8} = 2 \sqrt{2}[/tex]

AD = |9-2| = 7

2) equation of the line that passes threw BC

y = 7

3) equation of the line that passes threw AD

y = 5

conclusion

the quadrilateral has two parallel sides and two congruent sides, so it is a isosceles trapezoid

Answer:

isosceles trapezoid

Step-by-step explanation:

hope this helps

5 of 10
A fair dice is rolled.
Work out the probability of getting a number more than 4.
Give your answer in its simplest form.

Answers

Answer: 1/3

Step-by-step explanation:

numbers more than 4 are: 5, and 6

so 2/6 chance of rolling a number greater than 4

in simplest form this is 1/3

Answer:

number 4 are t is greater

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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Answers

Answer:

D

Step-by-step explanation:

9514 1404 393

Answer:

  C.  Residuals aren't random; linear is not a good fit

Step-by-step explanation:

The attached graph shows the given points (black) and the best-fit line (red). The residuals are connected by the dashed red line. They are decidedly NOT random. It appears that an exponential fit would work better than this linear fit.

The residual values are not randomly dispersed around the horizontal axis, so a linear fit is not appropriate.

will be giving brainliest to the correct one, no links or account will be reported:)

Answers

Answer:

x = 38

∠P = 26º

Step-by-step explanation:

The sum of the angle in a triangle is 180

x + (x + 78) + (x - 12) = 180

Combine like terms

3x + 66 = 180

Subtract 66 from both sides

3x = 114

Divide both sides by 3

x = 38

-----------------------

∠P = x - 12

∠P = 38 - 12

∠P = 26º

Answer:

Step-by-step explanation:

(x+78)+(x-12)+x=180

3x+66=180

3x=114

x=38

P=26

classify the number. select that apply. 7/4

Answers

Answer:

Rational numbers...

Step-by-step explanation:

Any number that can be written in the form a/b where a and b are integers and b unequal to 0, is called rational number

What is the length of the leaf to the nearest one fourth inch

Answers

Can you give specs of it?

is there a picture to the leaf

How many times does 2 go into 152.4

Answers

Answer:

76.2

Step-by-step explanation:

76.2 is the answer......

In the year 2003, a company made $5.4 million in profit. For each consecutive year after that, their profit increased by 9%. How much would the company's profit be in the year 2006, to the nearest tenth of a million dollars?

Answers

Profit in 2006:  $7 million

First convert the percent into decimal: 9% = 0.09

Then use the percent increase then multiply by the number using this formula: ( 1 + r ) = ( 1 + 0.09) = 1.09

You only want to find how much profit in 2006, so you do this:

2003: 5.4  

2004: 5.4 (1.09) = 5.886  

2005: 5.886 (1.09) = 6.41574  

2006: 6.41574 (1.09) = 6.99316

Then you take 6.99316 and round to the nearest tenth of a million dollars.

7 million dollars.

LA=
Round your answer to the nearest hundredth.
С
А
2
6
B

Answers

Answer:

Step-by-step explanation:

The measure of angle A is 19.47°.

What are Trigonometric Functions?

Trigonometric functions are the functions which are described as the ratio of sides of a right angled triangle.

Given a right angled triangle ABC.

∠C = 90° and AB = 6, is the hypotenuse.

We have to find the measure of angle A.

Given BC = 2, which is the opposite side with respect to ∠A.

We can use the definition of sine here.

Sine function of an angle is defined as the ratio of opposite side to the hypotenuse of the right angled triangle.

sin A = Opposite side / Hypotenuse

sin A = BC / AB

sin A = 2/6

sin A = 0.333

A = sin⁻¹ (0.333)

A = 19.47°

Hence the angle A has a measure of 19.47°.

Learn more about Sine of an angle here :

https://brainly.com/question/11070103

#SPJ7

Your question is incomplete. The complete question is as given in the image below.

PLEASE HELP

A special truck cleans the surface of the ice rink shown below. The figure is composed of a square and two semicircles. 105 If the truck cleans the entire surface, how many square meters of ice will the truck dean? Use 3.14 for T. Round your answer to the nearest tenth. Show your work. Answer: square meters​

Answers

Answer:

1026.02, you can round that online

Step-by-step explanation:

there are 3 red marbles,4 blue marbles,2 green marbles, 6 clear marbles in a burlap bag. One marble is randomly pulled from the bag. What is the probability the marble was green?

Answers

2/15 so 13.3% ?

I’m not entirely sure if this is right but I think it’s getting there...

The circumference of a circular field is 276 yards. What is the diameter of the field? Round your answer to the nearest hundredth.

Answers

Answer:

d ≈ 87.85 yards

Step-by-step explanation:

The circumference ( C) of a circle is calculated as

C = πd ( d is the diameter ), then

276 = πd ( divide both sides by π )

[tex]\frac{276}{\pi }[/tex] = d , so

d ≈ 87.85 yards ( to the nearest hundredth )

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