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

Please show steps on how you simplified it

Answers

Answer:

4(3^2)

3^2=9

4(9)= 36

Answer:

4(3•3)

4(9)

36

Step-by-step explanation:

3 to the second power is equal to 3•3, which is equal to 9

Then you do 4 times 9, equals to 36

What is the absolute value of -0.58?

Answers

.58. Absolute value gets rid of negative.

Answer:

0.58 I think because absolute value is positive

Plzz what the answer I’m stuck

Answers

Answer:

the answer to your question is 576 square feet

Step-by-step explanation:

Step 1: 96 ÷ 4 = 24

Step 2: 24×24 =576

88 x 88/22 x 11 x 11​

Answers

Answer:

42592

Step-by-step explanation:

Answer:42592

Step-by-step explanation: So what you do is do 88 times 88/22 and so on :)

The scale of a boat model is
2 inches = 6 feet. The boat
model is 15 inches long. How
long is the actual boat?

Answers

Answer: well 2 times 15 = 30

30 times 6 = 180. So the boat is 180 feet long

Step-by-step explanation:


Jess earns 5% cash back at restaurants. If she spent $213 at restaurants
this month, how much cash back will she receive?

Answers

Answer:   Jess will get $10.65

Stacy starts a savings account with $15. Each month she deposits 6$ more into her
account. Stacy now has $81 in her account. Write an equation, then solve, to find how
many months Stacy has deposited money into her savings account.

Answers

Answer:

After 11 months, Stacy will have $81 in her savings account.

Step-by-step explanation:

15 + 6m = 81

6m = 66

m = 11


Which expression is the simplest form of
(x4/7)^7

Answers

Answer:

7

Step-by-step explanation:

Write an expression and solve. Cole wants to buy a shirt for $25. The sales tax
is 8%. How much will the shirt cost?
Show your work:
A. $27
B. $33
C. $45
D. $227

Answers

Answer:

A

Step-by-step explanation:

8% of 25 is 2 so 25 + 2 =27

It’s A. I’m pretty sure!

Write the first ten terms of a sequence whose first term is -10 and whose common difference is -2. PLS ANSWER CORRECT ANSWER WILL GET BRAINLIEST 100 POINTSSS

Answers

Answer:

T

n

+

1

=

T

n

+

d

T

1

=

a

Where the first term is equal to

a

and the common difference is

d

.

Option a can be expressed as follows:

T

n

+

1

=

T

n

+

4

T

1

=

1

Option c can be expressed as follows:

T

n

+

1

=

T

n

4

T

1

=

1

Hence both are arithmetic sequences (the other two options are geometric sequences with common ratios of 4 and 0.25 respectively)

Hope that helps :)

Step-by-step explanation:

Three students Tahat, Promi and Kabi, Appeared at an examination. Promi secured 11 marks less than Tahat, 5 marks more than kabi and again. Tahat's marks were 75% of the sum of Promi and Kabi's marks. Find out their individual marks

Answers

Answer:     Tahat= 40.5 marks    Promi =29.5 marks,  Kabi =24.5 marks

Step-by-step explanation:

Step 1

Let the marks be represented as  x+11, x and x-5 for Tahat, Promi and Kabi respectively

and Tahat's marks which was 75% of the sum of Promi and Kabi's marks be expressed as

x+11 = 75/100(x + x-5)  

Step 2 --- Solving

x+11 = 75/100(x + x-5)  

x+ 11 = 3/4(2x-5)

x+11= 6x-15/4

4x+44=6x-15

44+15=2x

x= 59/2= 29.5,

A) x= Promi's  mark was 29.5

B)Promi secured 5 marks more than kabi

Therefore, Kabi's mark was 5 marks less than Promi

= x-5

29.5- 5= 24.5 marks

C)Promi secured 11 marks less than Tahat, Therefore Tahat marks were 11 marks more than Promi

x+11= 29.5 + 11= 40.5

Larissa takes a dose of 4 drops of medicine every day, three times a day. One milliliter (mL) of the medicine contains about 20 drops. If the medicine comes in a 12 mL bottle, approximately how many days will the bottle last?

Answers

Answer:

The bottle will last for 20 days.

Step-by-step explanation:

Given that:

Number of drops in a dose = 4 drops

Dose is taken three times a day, therefore,

Number of drops taken in a day = 4*3 = 12 drops

One milliliter = 20 drops

12 mL = 20*12 = 240 drops

Number of days the bottle will last can be find out by calculating total number of drops by the number of drops consumed in a day.

Number of days bottle will last = [tex]\frac{240}{12}=20[/tex]

Hence,

The bottle will last for 20 days.

50.2 x 1 10² tenths equal?

Answers

Answer:

607,420

Step-by-step explanation:

hope it is correct and helps

2. Bob bought 24 hockey tickets for $83. Adult tickets cost $5.50 and child tickets cost $2.00. How many child tickets did he buy?

Answers

Answer:

worked it out is correct your answers are there

Step-by-step explanation:

there are your answers

5h + 10 = 4h + h + 15

Answers

Answer:

h = no solution

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define

5h + 10 = 5h + 15

Step 2: Solve for h

Subtract 5h on both sides:                    10 ≠ 15

Here we see that 10 does not equal 15.

h has no solution.

Final Answer: No Solution

Steps/Reasons:

Step 1: Simplify [tex]4h + h + 15[/tex] to [tex]5h + 15[/tex].

[tex]5h + 10 = 5h + 15[/tex]

Step 2: Cancel [tex]5h[/tex] from both sides.

[tex]10 = 15[/tex]

Step 3: Because [tex]10 = 15[/tex] is false, there is no solution.

No Solution

~I hope I helped :)~

How long will it be from December 18 from 8:25 am to December 24 to 4.30 pm

Answers

December 18th to 24th is 6 days! And 8:25am to 4:30 pm is 8 hours and 5 minutes. So, in total, it’s 6 days, 8 hours, and 5 minutes.

THIRTY POINTS Will mark branliest if right.

Which expression is equal to the expression below?
(2 x 6)^4

A. 2^4 x 6^4
B. 8^4
C. 4 x (2 x 6)
D. 2 x (6)^4

Answers

Answer:A

Step-by-step explanation:A

Please help!!!! With 8 and 9

Answers

Answer:

8. slope: = 1/2

9. equation: y=1/2x

What is the graph of the given function?
f(x) = -2(x – 3)2 + 4
Graph

Answers

Answer:

the graph attached is the answer

Three friends pay 1025 to rent a vacation home. Beth contributed $80 more than danny. Katie contributed $20 less than Beth. How much did Danny contribute?

Answers

Answer:

Danny contributed $295

Step-by-step explanation:

Assume that Danny contributed $x

Danny contributed x

∵ Beth contributed $80 more than Danny

→ Add The amount of Danny by $80 to get the amount od Beth

Beth contributed x + 80

∵ Katie contributed $20 less than Beth

→ Subtract the amount of Beth by 20 to get the amount of Katie

∴ Katie contributed x + 80 - 20

Katie contributed x + 60

∵ The three friends pay $1025

→ Add their amounts and equate the sum by 1025

x + x + 80 + x + 60 = 1025

→ Add the like terms in the left side

∵ (x + x + x) + (80 + 60) = 1025

∴ 3x + 140 = 1025

→ Subtract 140 from both sides

∴ 3x + 140 - 140 = 1025 - 140

∴ 3x = 885

→ Divide both sides by 3

x = 295

∵ x represents the amount of Danny contributed

Danny contributed $295

Convert 3 2/7 into improper fractions

21/7
23/7
41/7
None of the above

Answers

Hello,

The correct answer is B.

Further explanation: The first step is to multiply 3 by 7. That gives you 21, then add 21+2. Then put your denominator at the bottom.

Workspace:

3 * 7

=21

21 + 2

=23/7

PLEASE HELP. SOON. I really need help i’m struggling a lot lol

Answers

Answer: A

Step-by-step explanation: trust me bro

A sphere is inscribed inside a cube with edges of 6 cm. In cubic centimeters, what is the volume of the sphere in terms of ?

Answers

V = 4πr³/3
Substituting,
V = (4/3)π(3 cm)³
V = 36π cm³

Derek needs 2 gallons water to mix a sport drink , but he only has a 1 cup measuring cup.

Answers

Answer:

He can fill up his fill up his measuring cup 8 times that is pretty simple

Step-by-step example

4 cups is in one gallon


Learning Task 2 without graphing tell whether the graphs of the system of equations are parallel, perpendicular,intersecting or coinciding
1.y = x + 7 and y = - x + 2
2.Y = 5x and y = 5x - 1
3. 2x + y = 1 and 2y + 4x = 2
4. Y = 2x + 3 and y = -x - 4​

Answers

Answer:

1.Perpendicular

2. Parallel

3. Parallel

4.

Step-by-step explanation:

If two lines are parallel, slope is equal

If perpendicular, product of slopes is -1

y = mx + c is the general equation of a line form

m represents slope

1. slope is -1 and 1, they are perpendicular

2. Slope is 5 in both cases, they are parallel

3. slope is equal; equation ii is same as i if rewritten

They are parallel

4.

Find the distance between the pair of points (2,-5) and (3,-7).

Answers

Answer:

        2.24

Step-by-step explanation:

[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\\(2,-5)\quad\implies\quad x_1=2\,,\ \ y_1=-5\\\\(3,-7)\quad\implies\quad x_2=3\,,\ \ y_2=-7\\\\d=\sqrt{(3-2)^2+(-7+5)^2}= \sqrt{1^2+(-2)^2}=\sqrt{1+4}=\sqrt5=2.236....\approx2.24[/tex]

The equation 125 + 37.52x = y models the amount of money in your wallet Y is the total amount of dollars and x is the number of weeks from today. Is the equation in slope intercept form? Explain

If you graphed this situation what would the slope represent? Explain

If you graphed this situation what would the y intercept be and what would it represent?

What units make sense for the slope?

Answers

Answer:

Please check solution for answer

Step-by-step explanation:

The general equation of for the slope of a line is

y = mx + c

where m is slope and c is the y-intercept

a). Yes it is in the slope-intercept form

b) The slope would represent the amount of money in dollars per week that is in the wallet

c) The y-intercept would be 125 and it is the amount of money present in the wallet before today

d) The slope would have a unit of dollars per week

ASAP

Solve the following equation by graphing each line below.

a) 2x+3=-x+9
b) Where do the two lines intersect? Write your answere in the form (x,y)​​

Answers

Answer:

x=2

Step-by-step explanation:

2x+x+3=9

2x+x=9-3

3x=9-3

3x=6

x=2

Answer:

a) 2x + 3 = -x + 9

or, 3x = 6

# x = 2 since there is no y in the equation the value of y could be 0.

b) it intersects at ( 2, 0 )

Step-by-step explanation:

will mark brainliest for the correct answer! just read the english, okay? the other language is the translation for the english.

Answers

Answer:

Step-by-step explanation:

Given equation is,

y = 3x² - 6x + 11

a). y = 3x² - 6x + 11

       = 3(x² - 2x) + 11

       = 3(x² -2x + 1 - 1) + 11

       = 3(x² - 2x + 1) - 3 + 11

       = 3(x - 1)² + 8

Comparing this equation with y = a(x - b)² + c

a = 3, b = 1 and c = 8

b). For minimum value of x,

    Since, vertex of the graph is given by (b, c),

    Minimum value of x will be,

    x = b

    x = 1

c). Vertex of the parabola → (b, c)

                                           → (1, 8)

    For y-intercept,

    By substituting x = 0 in the equation,

    y = 3(0 - 1)² + 8

    y = 11

Now we can sketch the graph by using the table of input - output values.

x         -2        -1           0            1             2          3

y        35        20         11           8            11         20  

what is this answer? :)

Answers

Answer:

the answer is b

Step-by-step explanation:

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