Q2
How
many cubic metres of earth must be dug to construct a well 7
m deep and of diameter 2.8 m?

Answers

Answer 1

Answer:

43.103m³

Step-by-step explanation:

This is just finding the volume of a cylinder problem.

Area of a circle = πr²

Area of circle * length of cylinder = volume

3.14*(1.4)² = 6.158m²

6.158*7 = 43.103m³


Related Questions

Simplify 12x^7y^3 divided by 6x^3y

Answers

Answer:

2y^3x^7-3y

Step-by-step explanation:

I had the same problem on my test and got it right trust me

The expression 12(x⁷)(y³) divided by 6(x³)(y) is equal to 2x⁴y².

What is a polynomial?

An expression that consists of variables, constants, and exponents that are combined using mathematical operations like addition, subtraction, multiplication, and division is referred to as a polynomial.

To simplify the expression, we can divide the coefficients and subtract the exponents of the variables with the same base.

Therefore:

12(x⁷)(y³) divided by 6(x³)(y)

= (12/6)(x⁽⁷⁻³⁾(y⁽³⁻¹⁾)

= 2x⁴y²

Therefore, 12(x⁷)(y³) divided by 6(x³)(y) is equal to 2x⁴y².

To learn more about Polynomials;

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Please helpp

-8x +(-56)=16

Answers

Answer:

x = -9

-8x + -56 = 16

-8x - 56 = 16

-8x = 16 + 56

-8x = 72

x = 72/8

x= -9

Answer:

-9

Step-by-step explanation:

-8x + (-56) = 16

Take away -56 from both sides

-8x = 72

Divide both sides by -8

x = -9

5d-3+2d=4d+9. I need help can you help me solve this problem

Answers

Answer:

D=4

Step-by-step explanation:

Answer:

d=4

Step-by-step explanation:

5d - 3 +2d = 4d +9

7d-3=4d+9

-4d    -4d

3d-3=9

     +3   +3

3d=12

divide both sides by 3

d=4

Francice says 86 divided by 4 is 20 with a reminder of 6 she reasons it's correct because ( 4x20 + 6 = 86 what mistake did franchise make. ( if you can answer this ill give you 40 brainless.

Answers

Answer:

Step-by-step explanation:

Francice says 86 divided by 4 is 20 with a reminder of 6 she reasons it's correct because ( 4x20 + 6 = 86 what mistake did franchise make. ( if you can answer this ill give you 40 brainless.

i dont know if this is it or not here 436

The remainder should be 2, not 6. Francine mistakenly added 6 instead of 2, leading to the incorrect conclusion. The correct statement is that 86 divided by 4 is 21 with a remainder of 2.

Francine made a mistake in her reasoning. The correct statement would be that 86 divided by 4 is 21 with a remainder of 2, not 20 with a remainder of 6.

Let's analyze her reasoning using the equation she provided:

4x20 + 6 = 86

If we multiply 4 by 20, we get 80, not 86. So, the correct equation should be:

4x20 + 2 = 86

By solving this equation, we find that:

80 + 2 = 86

Hence, the remainder should be 2, not 6. Francine mistakenly added 6 instead of 2, leading to the incorrect conclusion. The correct statement is that 86 divided by 4 is 21 with a remainder of 2.

For more details of remainder :

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help now please i need help

Answers

Answer:

C

Step-by-step explanation:

What is the greatest common factor (GCF) of 54 and 45?
A.
9
B.
270
C.
6

Answers

Answer:

Step-by-step explanation:

Letter A?

Junior's brother is 1\dfrac121 2 1 ​ 1, start fraction, 1, divided by, 2, end fraction meters tall. Junior is 1\dfrac151 5 1 ​ 1, start fraction, 1, divided by, 5, end fraction of his brother's height.

Answers

Answer:

1 4/5 meters

Step-by-step explanation:

Juniors brother = 1 1/2 meters tall

Junior is 1 1/5 of his brother height

Junior = 1 1/5 of 1 1/2

= 6/5 × 3/2

= 6 * 3 / 5 * 2

= 18/10

= 1 8/10

= 1 4/5 meters

Junior is 1 4/5 meters tall

Answer:

1 4/5

Step-by-step explanation:

its on khan (: trust me

NEED HELP!!! which point represents the ordered pair (-3,5)?

Answers

Answer:

The answer is A

Step-by-step explanation:

The answer is A,
Hope this helps

PLEASE HELP! BRAINLIEST IF CORRECT!
A certain crate can hold up to 1700 pounds when shipped. An item that weighs 110 pounds was placed in the box. If the variable "w" stands for the amount of additional weight the box can hold, which of the following units could apply to that variable?

A. inches
B. meters
C. gallons
D. pounds

Answers

I think it's d c is measuring water

Answer:

The answer is D. Pounds

Answer the two following question and will mark Brainliest

Answers

Answer:

Max: (-2,5)

Min: (-6,-4)

Answer:

(-2, 5) for the max and (-6, -4) is the min. That if the question is talking about max and min graph points!

Step-by-step explanation:

Hope it helps!

what is y-intercept?​

Answers

Answer:

The number  on the graph that touches the y-axis or the the c term. EX. 3x^2 + 2x -3. -3 is the y intercept

Step-by-step explanation:

6x/5 - x = x/15 - 10/3

Answers

Answer:

x=-25

6x/5 - x = x/15 - 10/3

x/5 = x/15 - 10/3

3x = x - 50

3x - x = -50

2x = -50

x = -50/2

X=-25

Answer:

1the answers is

email is 3rd

Paula is the student council member responsible for planning an outdoor student dinner dance. Plans include
hiring a band and buying and serving dinner. She wants to keep the ticket price as low as possible to encourage
student attendance while still covering the cost of the band and the food.
1.) Band A charges $700 to play for the evening and Band B charges $550 plus $1.50 per student.
a. Write a system of equations to represent the costs of the two bands. Use y for total cost and use x for
number of students.

Answers

Answer:

Band A:y=700

Band B:y=550+1.50x

Step-by-step explanation:

Band A: since they are a fixed rate no matter how many students the equation  would be y=700 . There is no need for x since there is no extra price for students

Band B: Since this band charges 550 plus 1.50 per student we will need a x in our equation

y=550+1.50x

The difference between the two equations is that in Band B we need to add the price per student.

What is the equation in slope intercept form of the line that passes through the point (2,2) and is perpendicular to the line represented by y=2/5x + 2

Answers

Answer:

y=

Step-by-step explanation:

Perpendicular means opposite reciprocal of the slope. This means that the slope would change from 2/5 to 5/2 and add a negative, so it is -5/2.

y=-5/2x+b

2=-5/2 (2) +b

7=b

y=-5/2x+7

PLS HELPP ME , ILL GIVE BRAINLIEST IF ITS A REAL ANSWER PLS

Answers

Answer:

For the chart, the missing number on top is 10. the bottom numbers are 1.5 then 9.

For the question, all of the numbers equal the ration 5:3.

Question 2: Yes. 30/x=2/4 which equals 60 (minutes) which is an hour.

Step-by-step explanation:

1A:

2.5 amount of water  - 1.5 amount of pasta

10 amount water - 6 amount pasta

15 amount water - 9 amount pasta

2.5 : 1.5

5 : 3

10 : 6

15 : 9

1B. these quantities are proportional because they can all be simplified to the same unit rate of 5 : 3.

2. Johnny is correct. The rate is 4 : 2, with a unit rate of 2 : 1. If you multiply both sides by 30 (how many inches deep the hot tub is) you get a ratio of 60 : 30, meaning it would take an hour to fill up the tub.

PLEASE HELP WILL GIVE 15 POINTS
Answer choices-
A- (0,8)

B- (4,0)

C- (10,0)

D- (0,10)

Answers

The answer is C- (10, 0). Hope this helps.
It’s C it’s the number closer to 20 than the other ones

what is 3/4 ÷ 1/8 tell me th asnwer

Answers

Answer:

3/4 * 8/1=24/4= 6

Step-by-step explanation:

3/4 ÷ 1/8

keep  change  flip

3/4  × 8/1

3×8=24  4×1=4

24/4 improper fraction

6 answer

Answer:

answers = 24/4 = 6

Step-by-step explanation:

what is the opposite -2/5

Answers

Answer:

it would be a positive 2/5

Step-by-step explanation:

Answer:

2/5 just not negative anymore!

Step-by-step explanation:

To eliminate the y terms and solve for x in the fewest steps, by which constants should the equations be multiplied by before adding the equations together?

First equation: 4x − 3y = 34

Second equation: 3x + 2y = 17

1.The first equation should be multiplied by 2 and the second equation by 3.
2.The first equation should be multiplied by 2 and the second equation by −3.
3.The first equation should be multiplied by 3 and the second equation by 4.
4.The first equation should be multiplied by 3 and the second equation by −4.

Answers

Answer:

Multiply the first equation by 2 and the second equation by 3 to eliminate y

Step-by-step explanation:

First equation: 4x − 3y = 34

Second equation: 3x + 2y = 17

Multiply the first equation by 2 and the second equation by 3 to eliminate y

2( 4x − 3y = 34 )  = 8x -6y = 68

3( 3x + 2y = 17) = 9x  +6y = 51

Add the equations together

8x -6y = 68

9x  +6y = 51

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

17 x    = 119

The correct answer should be A.

2x – 3y = 17 –3x + y = –1

Answers

Answer:

can u rewrite the questions

Step-by-step explanation:

Write the equation of the line

Answers

Answer:

The equation of the line is

[tex]y = \frac{1}{3}x - 2[/tex]

Step-by-step explanation:

Remember:

[tex]slope = \frac{rise}{run} [/tex]

If two triangles are similar with a zoom factor of 3, and the smaller one has area 12 sq. units, what is the area of the bigger one? the answer is 108 sq units, im curious how it got there

Answers

Answer:

Please check explanations

Step-by-step explanation:

Mathematically, the area of a triangle

A = 1/2 * b * h

b is base, h is height

For 12 square units, we can have a base of 6 and a height of 4

By tripling the dimensions for the second triangle, we will have a triangle of 18 by 12

So the new area is;

A = 1/2 * 12 * 18

That was how we got 108 square units

PLEASE HELPP!! (10 points)

Answers

Answer:

Gertrude, Bart, Hermione, Jojo

Step-by-step explanation:

Ok to start of lets identify the money in each bank account

I will not be using names to make this simpler.

Student A: $-100.54

Student B: $95.88

Student C: $50.00

Student D: $-120.37

Lets pretend that were not talking about money to help you understand this.

So just from glancing at this you'd think -120.37 would be the most because its the largest number correct?

Well you have to include the negative sign. The negative sign shows that this number is below 0.

Lets take a look at the other negative number.

-100.54

Greater or less than -120.37?

-100.54 is actually greater than -120.37

Why?

On a number line, the negative side, your counting back from 0. So the farther away you are from 0 for negatives, the less that number is.

So -120.37 would be the least and -100.54 would be the second least.

The greatest would be 95.88 because its greater than 50.

So the order would be 95.88, 50, -100.54, then -120.37

Just find which students that goes with and your done!

If you ever need more help don't be afraid to reach out and I hope that helps!

water flows from a faucet at a constant rate. Kian measures 8 cups of water in 6 second s. What is the constant proportionality for the relationship of cups of water to minutes

Answers

The answer would be 80 cups/1 min

a savings account earns 8% interest each year, compounded quarterly (4 times a year). If a person invests $100 and makes no further deposits or withdrawals, what is the balance in the account after 3 years?​

Answers

Answer:  126.82 dollars

===========================================

Work Shown:

The given values are

P = 100 = amount deposited (principal)r = 0.08 = decimal form of the annual interest raten = 4 = compounding frequencyt = 3 = number of years

Which means,

A = P*(1+r/n)^(n*t) .... compound interest formula

A = 100*(1+0.08/4)^(4*3) .... plug in given values

A = 126.824179456254 ..... value is approximate

A = 126.82 ...... round to the nearest cent

The balance of the account after three years is $126.82

Answer:

124 dollars

Step-by-step explanation:

.08 times 100 equals 8

eight times three is twenty four

that is the simplest answer. if the question had any further interests it might of been 126 or even 125.97

The bike store marks up the wholesale cost of all of the bikes they sell
by 30%. Andre wants to buy a bike that had a wholesale price of $125.
What is the marked up retail cost of this bike? (Type your answer as a
number price without units-$) *

Answers

Andre will pay $100 after discount:)

how to multiply 4 x 800 - VALIDS

Answers

Answer:

4x800=  3,200

Step-by-step explanation:

-22 + (-16)
Please help!

Answers

Answer:

-38

Step-by-step explanation:

The lowest elevation in Lammefjord, Denmark, is 23 feet below sea level. The elevation of the Sea of Galilee in Israel is about 30 times lower than the elevation of Lammefjord. What is the approximate elevation of the Sae of Galillee written as an integer?

Answers

Answer:

[tex]Sea\ of\ Galilee = -690ft[/tex]

Step-by-step explanation:

Given

[tex]Lowest\ Elevation = 23ft[/tex] below sea level

Sea of Galilee = 30 times Lowest in Lammefjord, Denmark

Required

Determine the elevation of the Sea of Galilee

We have that the lowest elevation in Lammefjord is:

[tex]Lowest\ Elevation = -23ft[/tex]

It is negative because, the elevation is below sea level.

Calculating the elevation of Sea of Galilee, we have:

Sea of Galilee = 30 times Lowest in Lammefjord, Denmark

[tex]Sea\ of\ Galilee = 30 * -23ft[/tex]

[tex]Sea\ of\ Galilee = -690ft[/tex]

Hence, the elevation of Sea of Galilee is -690ft or 690ft below sea level

Given vectors u = ⟨–2, 1⟩ and v = ⟨4, –2⟩, which statement is true concerning u and v? a. The vectors form an obtuse angle of approximately 93°. b. The vectors form an obtuse angle of approximately 96°. c. The vectors form an obtuse angle of approximately 127°. d. The vectors point in opposite directions.

Answers

Answer:

D) The vectors point in opposite directions.

Step-by-step explanation:

got it right on edge :)

see graph below

Answer:

D. The vectors point in opposite directions.

Step-by-step explanation:

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0.32 divided 38.9 please and thank you The drama states that Earhart was "commander" of the flight in name only. In what ways was Earhart as much in command of the Flight as Stultz and Gordon? Use at least two details PLEASE ANSWER QUICKLY your local newspaper has letters to the editor from 80 people. if this number represents 4% of all the newspaper readers how many readers does the newspaper have Can someone help me with 1-3 plz I will mark brainliest. Plz show steps thx what is the exponent of 4^4 I need help with this (2 parts so 20 points) ANSWER PLS ASAP Fireworks are an example of aamount of energy being I need help please Your friend doesnt go to the party because she has been studying all day and is tired. Which one of the following can she use to describe how she feels?estoy tristeestoy contentaestoy cansadaestoy enferma What is the Supreme Law of the Land in the United States?AO The Articles of ConfederationB The United States ConstitutionThe Declaration of IndependenceD The Collection of Natural Rights and ResponsibilitiesCan some help me with this please Use Scenario: A Small-Town Monopolist. If this monopolist must choose between selling 100 or 175 subscriptions, it will choose to sell _____ units at a price of _____ and earn economic profits equal to _____. a. 175; $10; $500.b. 100; $10; $750.c. 175; $15; $1,000.d. 100; $15; $1,000. 1. Find the slope of the line graphed below. The ___________ did not consider unfair taxes and regulations sufficient cause for rebellion. *1 pointLoyalistsPatriotsMinutemenMilitias Geniee die Punkte! Frhliche Weihnachten!"Whoever is happy will make others happy too." -Anne Frank In what city-state did democracy start in ancient greeceA:troyB:athensC:delphiD:rome Why do many investors choose to make diversification a key element of their investment strategies? in what layer of the atmosphere is the ozone layer found Catherine sketched the slope triangle on the previous slide. Notices that the slope triangle has a 2 and 4, so she thinks the slope is 2/4 or 1/2 Can someone please help? 10. Electromagnetic waves used to examine broken bones inside the body are called -6 (-2/3)How is it solved