MATH!! COMPUTE THE AREA OF A CIRCLE!!

MATH!! COMPUTE THE AREA OF A CIRCLE!!

Answers

Answer 1

Answer:

First answer is correct

Step-by-step explanation:

pi*r^2

use formula and substitute

r is the radius so half the diameter

Answer 2
Pi Times radius Times 2 and if you only get the diameter split it in half for example if the d=4 the radius is 2

Related Questions

A magician is doing a trick that needs 3 volunteers and he has 100 audience members to choose from. How many different ways can the magician choose his volunteers?

Answers

Answer:

he can use a random sample or a random number generator which is a tool for making or generating numbers with no pattern to make a good representative of that population but it can be more if you want. He can also choose three people or more by asking them to raise their hand who wants to be a volunteer and do not raise their hand if they dont want. So hopefully those are the two ways.

Step-by-step explanation: Sorry if i get it wrong but i tried my best i had.

What is the SURFACE AREA of this TRIANGULAR PRISM? Base:6ft Height:2ft Length:6ft Width:10ft

Answers

Answer:

I think it would be 120

Step-by-step explanation:

6x10x2=120

PLEASE HELP ME. PLEASE.

Answers

Answer:

See below ~

Step-by-step explanation:

A)

3(-18)(5)-90(3)-270Correct

B)

(-7)(-3)(10)21(10)210Correct

C)

(4)(-25)(-10)250(4)1,000 Correct

D)

(-3)(-5)(8)15(8)120 ≠ -120Incorrect

E)

(-10)(-10)(-10)100(-10)-1,000 ≠ -10,000Incorrect

Answer:

A, B and C are correct

Step-by-step explanation:

[tex](-a)(b)=-ab[/tex]

[tex](-a)(-b)=ab[/tex]

[tex]\sf A) \quad 3(-18)(5)=3(-90)=-270[/tex]

[tex]\sf B) \quad (-7)(-3)(10)=7 \cdot 3 (10)=21(10)=210[/tex]

[tex]\sf C) \quad (4)(-25)(-10)=(4)(25 \cdot 10)=(4)(250)=1000[/tex]

[tex]\sf D) \quad (-3)(-5)(8)=(3 \cdot 5)(8)=(15)(8)=120[/tex]

[tex]\sf E) \quad (-10)(-10)(-10)=(10 \cdot 10)(-10)=(100)(-10)=-1000[/tex]

James had 25% more paper clips than Andy. Mary had 70 paper clips. If the three of them had 520 paper clips altogether, express Mary's paper clips as a percent of Andy's paper clips.

Answers

Answer:

Percentage is a part of a whole. The percentage change in the number of paper clips is 12.5%.

Given to us

Number of Paper clips Initialy= 72

Number of Paper clips now = 63

We know that the paper clip, in the beginning, was 72 but later on it was reduced to 63. therefore, the paper clips were reduced from the initial value.

\text{Percentage change} =\rm \dfrac{Initial\ value\ - final\ value}{Initial\ value} \times 100Percentage change=

Initial value

Initial value −final value

×100

Substitute the value,

\text{The percentage change in the paperclip } =\rm \dfrac{Initial\ value\ - final\ value}{Initial\ value} \times 100The percentage change in the paperclip =

Initial value

Initial value −final value

×100

\begin{gathered}\begin{aligned}\text{The percentage change in the paperclip } &=\rm \dfrac{72-63}{72} \times 100\\\\&= 12.5\% \end{aligned}\end{gathered}

The percentage change in the paperclip

=

72

72−63

×100

=12.5%

Hence, the percentage change in the number of paper clips is 12.5%.

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Step-by-step explanation:

THIS ANSWER IS CORRECT

BRAIN LESS ANSWER

No se ingles pero lo de arriba la primera yo creo que si te sirve échale ganas tu puedes

On a piece of paper, graph f(x) = {2 if -5 < x ≤ -1
4 if -1 < x ≤ 2
6 if 2 < x ≤ 5

Then determine which answer choice matches the graph you drew.

Answers

Answer:

its A beacuse

Step-by-step explanation:

Simplifying

41n(7x) = 8

Remove parenthesis around (7x)

41n * 7x = 8

Reorder the terms for easier multiplication:

41 * 7n * x = 8

Multiply 41 * 7

287n * x = 8

Multiply n * x

287nx = 8

Solving

287nx = 8

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Divide each side by '287x'.

n = 0.02787456446x-1

Simplifying

n = 0.02787456446x-1

The choice that matches the graph of the function as is defined to Graph A.

What is Graph?

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

A graph contains data of which input maps to which output.

Analysis of this leads to the relations which were used to make it.

The given function are;

f(x)= 2 ,if 2 < x ≤ 4

f(x)= 4, if 4 < x ≤ 6

f(x)= 6  ,if 6 < x ≤ 8

This means that how we get the staircase pattern as shown in graph A. This is considered a piecewise function since we're graphing pieces of various other functions.

Hence, the choice that matches the graph of the function as is defined to Graph A.

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Please help! -The volume inside a rectangular storage room is 2,052 cubic feet. The room is 9 feet high. Find the area of the floor.

Answers

Answer:

volume=Length x width x height

so area is Length x width, therefore you would just take 2,025 and divide by 9 to get 225 sq. ft for the area.

Step-by-step explanation:

Answer:

227 square feet

Step-by-step explanation:

The volume of a rectangular prism is given by the formula ...

V = Bh

where B is the area of the base, and h is the height.

Filling in the given information, we have ...

2043 ft³ = B·(9 ft)

Dividing by the coefficient of B gives its value:

B = (2043 ft³)/(9 ft) = 227 ft²

The area of the floor is 227 square feet.

I hope this helped have a great day

Tree Diagrams and the counting Principle (PLEASE HELP)

Answers

i’m pretty sure that
10. is 1/8
11. 0/8 ?? i don’t see a 9
Unlikely
Likely
Unlikely

The owner of a small store buys coats for ​$55.00 each.

Part 1
a. sells the coats for ​$77.00 each. What percent of the purchase price is the sale​ price?

Answers

Answer:

71.43%

Step-by-step explanation:

$77___100%

$55___x=71.43%

$55*100/$77 = 71.43%

71.43%

$77—100% is total amount of money

$55—x=71.43%—which is left

Then we times them and divide 100*$55/$77=71.43

Which is our answer! Hope it helps

brainliest* find the diameter of the circles (show work of all three)

Answers

Answer:

4. 30 ft

5. 4m

6. 32 mm

Step-by-step explanation:

Diameter = 2(radius)

Since they give the radius in all of them, you multiply the radius by 2 for all.

4. 15 * 2 = 30 ft

5. 2 * 2 = 4 m

6. 16 * 2 = 32 mm

Answer:

4. 30 ft          5. 4m      6. 32 mm

Step-by-step explanation:

Suppose the probabilities for the letters on a spinner are known to be: p(A)=1/4 p(B)=1/3 p(C)=5/12 predict the number of times you would land on each letter if you were to spin the spinner 12times

Answers

Answer:

you'd land on A 3 times, on B 4 times, C 5 times

Step-by-step explanation:

you simply have to divide 12 by each of the values

so basically:

A= 12 : 4

B= 12 : 3

C= Well it's 5 out of 12 so the answers already there

Please help its urgent and timed.
In the diagram, GHK- (Triangle here) MNP.
what is the length, in units, of side mn?
A. 1.4
B. 1.6
c. 2.4
d.2.6

Answers

Answer:

it is 2.4

Step-by-step explanation:

Scooby and Shaggy have a new job!

Answers

answer: x < 8

Step-by-step explanation: the inequailty is 100 + 7.55x < 160 if you subtract 100 on both sides you get 7.55x < 60 divide 7.55 you should get 7.947 which rounds up to 8 so your answer would be x < 8

The picture is mad blurry I can’t see anything

Identify an acute angle and give its measure.

Answers

Answer:

k&F 20 degrees

Step-by-step explanation:

hope it helps

D and H 75 degrees.

How many times bigger is 3.45×10⁹ than 0.5×10⁴

Answers

Answer:

It's 50,000 times bigger.

Step-by-step explanation:

3×10¹⁵ ÷ 6×10¹⁰ = (3 ÷ 6)×(10¹⁵÷10¹⁰) = 0.5×10¹⁵⁻¹⁰ = (5×10⁻¹)×10⁵ = 5×10⁻¹⁺⁵ = 5×10⁴ It is 5×10⁴ (= 50,000) times bigger.

3.45 x 10^9= 3, 450,000,000
0.5 x 10^4= 5000
Then divide
690,000 times bigger?? I’m not sure lmk if I’m wrong

Sanjay called random phone numbers in his state until he reached 1,000 people. Among those who answered the phone, 385 consented to participate in Sanjay's survey.

Is this a random sample of the people in the state?

Answer as Yes or No

Answers

Answer: NO

Step-by-step explanation:

This is because if you think about it, only the people that want to do the survey do it. Those who dont want to do it dont have to. This makes it voluntary. Any time the surveyed person gets to choose if they can do it it is voluntary. Furthermore, If it is voluntary it can usually represent all of the different peoples. But in this case, the shy people dont get a say because they would choose to not survey. So the shy people would not be represented. That is why this isn't random.

(do all three and show work) find the circumference of the circle. use 3.14 or [tex]\frac{22}{7}[/tex] for [tex]\pi[/tex]

Answers

Answer: 3: 50.24

Step-by-step explanation: 3: because to find the circumferrence you would do 3.14×8 the radius 25.12×2= 50.24, now with that try the other 2

A table has a wooden support that is in the approximate shape of a cone. The base of the cone has an area of about 201.1 square inches. If the volume of the cone is about 2,144.7 cubic inches, what is the height?

Answer choices:
A)
28 in.

B)
30 in.

C)
32 in.

D)
40 in.

Answers

The answer will be A) 28 in.

The height of a cone with a volume and base area of 2,144.7 cubic inches and 201.1 square inches respectively is 32 inches

How to find height of a cone using the volume formula?

volume of a cone = 1 / 3 πr²h

where

r = radiush = height

Therefore,

volume of the cone =  2,144.7 cubic inches

Base area = 201.1 square inches.

πr² = Base area

Therefore,

2144.7  = 1 / 3 × 201.1  × h

6434.1 = 201.1 h

h = 6434.1 / 201.1

h = 31.9945300845

h = 32 inches

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Help find the angle Also Branlyist

Answers

Answer:

this is an obtuse angle

Step-by-step explanation:

a picture for proof

It’s an obtuse angle. use ur protractor to measure it - it should be higher than 90

what is reflection and reflected

Answers

Answer:

Reflection is every point is the same distance from a central line

Reflected is a transformation representing a flip of a figure

Step-by-step explanation:

Sorry!!!!

reflection: basically just mirroring the shape or whatever you’ve been given over a line.
reflected: the new shape you’ve drawn over the line has been reflected

How many micrometers are in a decimeter and how many millimeters are in a nanometer? The table is shown below with the length of the unit (in meters).

Answers

1 decimeter =
100000 micrometers

1 nanometer=
1 × 10^-6 millimeter

1 × 10-6= 0.0000001
1 decimetre is 100000 micrometers and that’s all I know :)

Help me solve this. Please, it's math.

Answers

J and M bc they’re side by side
J and M because they both are touching angle n

can you help please thank you

Answers

these are the correct answers

Answer:

1) y=3 (0,3)

2) y=7 (4,7)

3) y=8 (5,8)

4) y=9 (6,9)

Step-by-step explanation:

These are the answer because you are just adding 3 to the x coordinate which will be the number for the y coordinate.

The weights (in ounces) of several moon rocks are shown in the table. Find the mean, median, and mode of the weights. Moon Rock Weights (ounces) 2.2 2.2 3.2 2.4 2.8 3.4 2.6 3.0 2.5

Answers

Answer:

the mode that repeats the most is 2.2 becuase to find it you need to find the number that repeats the most in the table. To find the median you add all the numbers and divide them to get the answer that is 2.7 for the mean but to find the median you need to order them from least to greatest and the answer you get for the median is 2.6 so hopefully that is the correct answer for all of them.

Step-by-step explanation: Mark me brainliest please if you want and see you next time :DDDDDDDDD

PLS HELP!
I will give brainlyest to right answer

Answers

Answer:

[tex]\textsf{C)}\quad 3x-45=10[/tex]

Step-by-step explanation:

Given equation:

[tex]\dfrac15x-3=\dfrac23[/tex]

Multiply both sides by 3:

[tex]\implies 3\left(\dfrac15x-3\right)=\dfrac23 \cdot 3[/tex]

[tex]\implies \dfrac{3 \cdot 1}{5}x-3 \cdot 3=\dfrac{2 \cdot 3}{3}[/tex]

[tex]\implies \dfrac35x-9=2[/tex]

Multiply both sides by 5:

[tex]\implies 5\left(\dfrac35x-9\right)=2 \cdot 5[/tex]

[tex]\implies \dfrac{5 \cdot 3}{5}x-5 \cdot 9=10[/tex]

[tex]\implies 3x-45=10[/tex]

C. 3x-45=10
Explanation
1/5x-3=2/3
Multiply both sides
3x-45=10

Math help!

77-999+6 divided by 2 =

Answers

77-99+6 divided by 2= -458
77-999+7divided by 2 would be -458

QUICK 20 POINTS - MEAN ABSOLUTE DEVIATION

Answers

Answer:

11.58000

Step-by-step explanation:

Answer:

4.28

Hope This Helps! :)

At the bottom is a completed addition problem with all the digits replaced by letters. Every letter represents a single digit and different letters represent different digits. What digit might the letter T represent?
MH+ MH+ MH = TM
Please Help ASAP
BRAINLIEST

Answers

T= 5 (H = 7, M = 1); T = 7 (H = 4, M = 2); T = 9
(H=1, M =3)
Step-by-step explanation:
We know MH+MH+MH=TM
MH is a two digit number, and TM is also a
two digit number.
MH+MH+MH=3*MH<100
3M<=9, meaning that M could be 1, 2, or 3.
If M=1,
MH+MH+MH=3(10+H)=30+3H=TM=10*T+1
30+3H=10T+1, so 3H must include 1 in one's
digit.
The only possibility is that 3H = 21, then H = 7
MH+MH+MH=17+17+17=TM=51, T = 5
If M=2.
MH+MH+MH=3(20+H)=60+3H=TM=10T+2
60+3H=10T+2, so 3H must include 2 in one's
digit.
The only possibility is 3H = 12, then H = 4
MH+MH+MH=24+24+24=72, T = 7

IT IM=4,
MH+MH+MH=3(20+H)=60+3H=TM=10T+2
60+3H=10T+2, so 3H must include 2 in one's
digit.
The only possibility is 3H = 12, then H = 4
MH+MH+MH=24+24+24=72. T=7
If M=3.
MH+MH+MH=3(30+H)=90+3H=TM=10T+3
90+3H=10T+3, so 3H must include 3 in one's
digit.
The only possibility is 3H = 3, then H =1
MH+MH+MH=31+31+31=93. T=9 please mark brainiest thanks

(HELP)The two numbers rolled can be added to get a sum. Find P (sum is greater than 5)
5/6
13/18
5/18
1/3

Answers

Answer:

13/18

Step-by-step explanation:

im a math teacher at k12 online school

Explanation:

1) Draw a table

+      1       2      3      4      5      6

1     2      3      4      5      6      7

2     3      4      5      6      7      8

3      4      5      6      7      8      9

4      5      6      7      8      9      10

5     6      7      8      9      10      11

6      7      8      9      10      11       12

2) Then you count how many are above 5 (not in bold). I got 26, so this will be your numerator.

3) Finally, for the denominator, do 6x6 which is 36.

Answer:

Your answer as a fraction will be 26/36 (if asked to simplify, then it's 13/18)

100 Points!
Use the function f(x) to answer the questions:


f(x) = 4x2 − 7x − 15


Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 points)


Part B: Is the vertex of the graph of f(x) going to be a maximum or a minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points)


Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph. (5 points)

Answers

Part A: x = -5/4, 3 || (-5/4, 0) (3, 0)

To find the x-intercepts, we need to know where y is equal to 0. So, we will set the function equal to 0 and solve for x.

4x^2 - 7x - 15 = 0

4 x 15 = 60 || -12 x 5 = 60 || -12 + 5 = -7

4x^2 - 12x + 5x - 15 = 0

4x(x - 3) + 5(x - 3) = 0

(4x + 5)(x - 3) = 0

4x + 5 = 0

x = -5/4

x - 3 = 0

x = 3

Part B: minimum, (7/8, -289/16)

The vertex of the graph will be a minimum. This is because the parabola is positive, meaning that it opens to the top.

To find the coordinates of the parabola, we start with the x-coordinate. The x-coordinate can be found using the equation -b/2a.

b = -7

a = 4

x = -(-7) / 2(4) = 7/8

Now that we know the x-value, we can plug it into the function and solve for the y-value.

y = 4(7/8)^2 - 7(7/8) - 15

y = 4(49/64) - 49/8 - 15

y = 196/64 - 392/64 - 960/64

y = -1156/64 = -289/16 = -18 1/16

Part C:

First, start by graphing the vertex. Then, use the x-intercepts and graph those. At this point we should have three points in a sort of triangle shape. If we did it right, each of the x-values will be an equal distance from the vertex. After we have those points graphed, it is time to draw in the parabola. Knowing that the parabola is positive, we draw in a U shape that passes through each of the three points and opens toward the top of the coordinate grid.

Hope this helps!

Answer:

Give the other guy brainliest

Step-by-step explanation:

Part A: The x-intercepts are (-5/4, 0) and (3, 0)

0=4x^2-7x-15

0=4x^2-12x+5x-15

0=4x(x-3)+5(x-3)

0=(4x+5)(x-3)

Basic math:

x=-5/4

x=3

Part B: The vertex is going to be minimum because if a>0, then the parabola opens up and it is a minimum (a as in ax^2+bx+c).

In order to find the vertex's coordinates, we can use -b/2a. In the equation, b=-7, and a=4. The formula would look like or 7/8. We now know the x coordinate. We can use that to find the y value.

y=4(7/8)^2-7(7/8)-15=y=18  =-18.0625=289/16

Part C: Graph the x-intercepts found in part A, then graph the vertex found in part B. Then graph a U shape that opens up going through all the points to make the parabola. Because it is positive, the U will face up, not down.

I also need help with this math problem.

Answers

Answer:

absolute devlation is

1, 1 + 5+9,4+1, 2+8,1+4,3

Step-by-step explanation:

=4,9

95,5 -> 105 3

have a nice day

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