the diameter of an iron ball used in putting the hot is 12cm the density of the iron is 7.89/cm3 calculate the mass of the ball in kg​

Answers

Answer 1

Answer:

Step-by-step explanation:

radius r of iron ball r=12/2=6 cm

volume of iron ball=4/3  πr³

=4/3π×6³

=288 π cm³

≈288×3.14

=904.32 cm³

density=7.89gm /cm³(unit not mentioned)

mass of iron ball=904.32×7.89=7135.0848 gm.=7.135 kg

288π×7.89≈7138.703 ≈7.139 kg (if density is 7.89 gm/cm³)


Related Questions

The distance around the edge of a circular pond is 88m. The radius,in meters,is?

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Answer:

88/ 2π

Step-by-step explanation:

If M.p = 3,240 and S.P = 2,754 then discount=

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The discount is 486.

The discount will be:

= 3240 - 2754

= 486

Help me with this problem i am stuck in screenshot

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It will take him 28 minutes.

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Answer:

the answer is 3x as that is the slope

Answer:

3

Step-by-step explanation:

yeah < 3

Find the constant(s): 12x - 8 - 12​

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Hello there!

-8 and -12 are constants

A constant is any real number.

Hope this helps!

~Just a determined gal

#CarryOnLearning

[tex]MysteriousNature[/tex]

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The value of x is 23 because BC and EF are equal

The equations of three lines are given below. PLEASE HELP ME THIS IS DUE TODAY

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Answer:

Line 1 & 2 is Perpendicular

Line 1 & 3 is Neither

and Line 2 & 3 is Neither

What is the solution for the inequality 4≤r/18+10?

Answers

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you start with a given set of rules and conditions and determine something to be true. What type of reasoning did you use?

Answers

Answer:

Deductive Reasoning.

Step-by-step explanation:

Basically it’s logical thinking in simply terms.

What is the radius of both circles? (I NEED HELLLLPPPPP)

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Answer:

Ik think that the first one is 5. im not sure tho

BD bisects ABC. m ABC = (5x – 4) CBD = (3/2x+21) what's kind if angle is ABC ​

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Answer:6 this is the answer

The distance from Jason's house to school is 0.9 kilometer. What is this distance in meters?

The distance from Jason's house to school is
meters.

Answers

Answer:

900 meters

In 0.9 move the decimal two times to the right

That makes it 900 meters

I really need help with this question

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Answer:

  a) 625; 625; right triangle

  b) 205; 256; obtuse triangle

Step-by-step explanation:

The squares are values found in your memory or using a calculator. It is straightforward addition to find their sum.

left side

7² +24² = 49 +576 = 625

25² = 625

The sum of the squares of the short sides is the square of the long side, so this is a right triangle.

__

right side

6² +13² = 36 +169 = 205

16² = 256

The long side is longer than is needed to form a right triangle, so the largest angle is more than 90°. This is an obtuse triangle (as shown).

Classify the following polynomial by degree and the number of terms.
3x² - 7

Answers

Answer:

A.) Quadratic binomial

Step-by-step explanation:

The degree of 2 (x²) makes the polynomial quadratic. It is binomial because it contains 2 terms.

The polynomial is:

↬ quadratic binomial

Solution:

We classify polynomials based on the number of terms and the degree,

No. of Terms

monomial - 1 term

binomial - 2 terms

trinomial - 3 terms

polynomial - 4 terms or more

Degree (highest exponent)

first

second (quadratic)

third (cubic)

fourth (quartic)

and so on.

[tex]\pmb{3x^2-7}[/tex] has 2 terms. Its highest exponent is 2, so clearly, we have a quadratic binomial.

Hence, 3x² - 7 is a quadratic binomial.

Lashonda is on the swim team. Each week she swims a total of 9000 meters. How many kilometers does she swim each week? Be sure to include the correct unit in your answer.

Answers

Answer:

Rate is 9 kilometers (km)/week.

Step-by-step explanation:

9000 meters is 9 km (divide m by 1000 to get km)

PLS HELP ME IMMA CRY ONGG GGHGHJH

Answers

Answer:

127

Step-by-step explanation:

We started at 7

We keep going up 3

multiply

[tex]3\cdot40=120[/tex] Now add [tex]120+7=127[/tex] at the 40th term

Answer:

I believe its 127?

Step-by-step explanation:

I solved this by 7+3x40 and that was my answer.

Please tell me if its wrong, if so tell me what the correct one is. :)

Have a good day!

someone pls help me with this test i was in quorintine and missed a lot and the teacher is still making me take it.
i can only put 5 questions here out of 12

Answers

In first question x=8, I’m too lazy to solve the rest

Order the rational numbers from least to greatest
-45/7
9/7
0/7
-4/7
6/7
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Answers

Answer:

-45/7

-7/7

-4/7

0/7

6/7

9/7

-45/7
-7/7
-4/7
0/7
6/7
9/7
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Sam has 3 more than twice the number of baseball cards that Catherine has. Together Sam and Catherine have 51 baseball cards. How many cards do Sam and Catherine each have? ​

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Answer:

catherine has 16 card and sam also has 16 card

In a school egg drop challenge, 68 of the eggs broke out of 100 total. What percent of the eggs survived the drop?

Answers

68% did not make it
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I NEED HELP THIS IS DUE TODAY ​

Answers

Answer:

Sorry I don't know. My advise take the problem step by step.

Step-by-step explanation:

Step-by-step explanation:

a. (8x³ - 5x² + 4x - 5) - (6x³ - 4x² - x + 2)

= 2x³ - 9x² + 3x - 3

hence, remainder distance is 2x³ - 9x² + 3x - 3.

b. (6x - 3y + 4z - 2m) + (4z - 4y + 5x - 2m)

= 11x - 7y + 8z - 4m

hence, (6x - 3y + 4z - 2m) should be subtracted from (11x - 7y + 8z - 4m) to get (4z - 4y + 5x - 2m)

c. (-1x + 6x² - 2) + (2x² - 3 - 2x)

= 8x² - 5 - 3x

now,

(10x² - 5 + 2x) - (8x² - 5 - 3x)

= 2x² - x

therefore, measure of 3rd side of the triangle is 2x² - x.

e. a² + 1a

f. x(6 - 2x) = 6x - 2x²

g. -2ab ( 3ab² + 2a²b ) = -6a²b³ - 4a³b²

h. -3b

I. -2x

HOPE THIS ANSWER HELPS YOU DEAR! TAKE CARE

The vertex of a parabola is (-2,6), and its focus is (-5,6).
What is the standard form of the parabola?
Enter your answer by filling in the boxes.

Answers

The equation of the parabola is:

(y - 6)² = -12(x +2)

Parabola is the locus of a point such that its distance from a fixed point (called the focus) and a given line (called the directrix) is always the same.

The equation of a parabola is given by:

(y - k)² = 4p(x - h)

Where (h, k) is the vertex, (h + p, k) is the focus

Given the vertex of a parabola is (-2,6), and its focus is (-5,6).

Hence, k = 6, h = -2;

h + p = -5

-2 + p = -5

p = -3

Hence the equation of the parabola is:

(y - 6)² = -12(x +2)

Find out more at: https://brainly.com/question/21685473

The settlement at Jamėstowi began in 1607. This was
how many years after Columbus reached the Americas
in 14927

Answers

Answer:

15

Step-by-step explanation:

jamestown really began in 1606 in may and columbos reached america in 1497

the answer is 115 because you have to subtract 1492 from 1607

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Answer:

2.2+3(3.4)

=2.2+10.2

=12.4

Step-by-step explanation:

What is the slope of the line passing through the points (-3, 4) and (2, - 1)?
A -5/3
B 3/5
C -1
D 1

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Answer:

-1

Step-by-step explanation:



Please help me answer!

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Answer:

what is the question?

Step-by-step explanation:

suppose that a flu virus spreads according to the

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We will All get sick and would have to stay home just like cocos

The product of two positive numbers is 9. The reciprocal of one of these numbers is 4 times the reciprocal of the other number. What is the sum of the two numbers?

Answers

Answer:

7 and 1 / 2

Step-by-step explanation:

xy = 9

( 1 / x ) = 4 ( 1 / y )

y = 4x

x ( 4x ) = 9

4x^2 = 9

x = 3 / 2

( 3 / 2 ) y = 9

y = 6

6 + ( 3 / 2 ) = 7 and 1 / 2

The two numbers are 3/2 and 6.

What are reciprocal numbers?

The reciprocal of a number is this fraction flipped upside down.

Given that, The product of two positive numbers is 9. The reciprocal of one of these numbers is 4 times the reciprocal of the other number.

Let the numbers be a and b.

ab = 9.......(i)

1/a = 4/b

a = 4b..........(ii)

Using (i) in (ii)

4b×b = 9

b² = 9/4

b = 3/2

a×3/2 = 9

a = 6

Hence, The two numbers are 3/2 and 6.

For more references on reciprocal numbers, click;

https://brainly.com/question/15590281

#SPJ5

help please super easy

Answers

Answer:

with what i dont see nothing

Step-by-step explanation:

XD

you were right this was super easy.

April's unpaid balance is $200.15. Her APR is 15% and she has $80.50 in new transactions. What is her new balance?

Answers

Based on the information given the new balance is $283.15.

Using this formula

New balance=Principal+ [Principal ×(APR/12)]+New transaction

Where:

Principal=$200.15

APR=15%

New transaction=$80.50

Let plug in the formula

Let plug in the formula

New balance=$200.15+($200.15×(0.15/12)+$80.50

New balance=$200.15+$2.50+$80.50

New balance=$283.15

Inconclusion  the new balance is $283.15.

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