Mathematics Middle School

The area of a circle is represented by the equation A=πr2, where r is the radius. The area is 64π m2.

What is the length of the diameter?

The Area Of A Circle Is Represented By The Equation A=r2, Where R Is The Radius. The Area Is 64 M2.What

Answers

Answer 1
The length of the diameter is:

16 metres
Answer 2

The length of the diameter is 16 cm.

What is Area of Circle?

The area of a circle is pi times the radius squared.

i.e., Area of Circle = πr².

Given:

Area = 64π m²

Now, Area of Circle= πr²

64π = πr²

64 = r²

r= √64

r= 8 cm

and, the diameter= 2(8)= 16 cm.

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Related Questions

Can someone please help me with this?

Answers

Answer:

Refer to the attached image.

Step-by-step explanation:

Use decimal places and superscripts. If you want a more detailed explanation, ask and I'll give you one.

SOLVE THE EQUATION!!!!!!!!

Answers

C: 2,6 and d: 0,26 i hope it helped :)

Answer:

c = 2.6 = [tex]\frac{13}{5}[/tex] = 2 [tex]\frac{3}{5}[/tex]

Step-by-step explanation:

d = 0.26 = [tex]\frac{13}{50}[/tex]

Hope this helps

In a bag of marbles, the probability of randomly selecting a yellow marble is 0.3.
The probability of randomly selecting a blue marble is 1/4
Which of the following is true?

A. It is less likely a blue marble is selected than a yellow marble.

B. It is more likely a blue marble is selected than a yellow marble.

C. It is equally as likely a blue marble is selected as a yellow marble.

D. There is no way to compare the two probabilities since we do not know how many marbles are in the bag.

Answers

Answer:

A

Step-by-step explanation:

if you know about% and if it is a number like 3 we will say and if it is like .3 that means that it is 30 % to 1/4th of 100 is 25

A. Because 1/4 = 0.25 so 0.3>0.25

I will give branliest!

Answers

Answer:1: 1 + 12- += -11

2:2 +13-= -11

Step-by-step explanation: i can't see the other one i tryed my best.

-3+-8=-11
-8+-3=-11

(-11)-(-8)=-3
(-11)-(-3)=-8

the question is in the photo :)

Answers

Answer:

1st question. A.

2nd question. D

Step-by-step explanation:

WILL MARK BRAINLIEST Which table represents a relation with a domain of (-1, 2} and a range of (3,5)?

Answers

Answer:

C

Step-by-step explanation:

Second table represents the relation with a domain of {-1, 2} and a range of {3, 5}.

What do you mean by domain and range of a function?

For any function y = f(x), Domain is the set of all possible values of y that exists for different values of x. Range is the set of all values of x for which y exists.

Given is a relation with a domain of (-1, 2) and a range of (3, 5)

It can be seen that second table represents the relation with a domain of {-1, 2} and a range of {3, 5}.

Therefore, second table represents the relation with a domain of {-1, 2} and a range of {3, 5}.

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Write each Quadratic function in standard form. The 2 picture is my notes to help with the answer.

Answers

Answer:

33) 4x² + 8x + 1

35) -2x² + 36x - 147

         

Step-by-step explanation:

#33: f(x) = 4(x+1) ² - 3

f(x) = 4(x+1) ² - 3

First Step: Multiply (x+1) (x+1)

(x + 1)² or (x+1)(x+1) is a one real double.

A one real double means that there is only one real solution

(x + 1) (x + 1) = x² + 2x + 1

Second Step: Multiply x² + 2x by 4

4(x² + 2x + 1) = 4x² + 8x + 4

Final Step: Put -3 in the Quadratic Function and do -3 + 4 to get your constant

4x² + 8x - 3 + 4

= 4x² + 8x + 1

#35: f(x) = -2(x - 9) ² + 15

First Step: Multiply (x - 9) (x - 9)

Remember, (x - 9) ² or (x - 9) · (x - 9) is a one real double, meaning that there is only one real solution.

(x - 9) (x - 9) = x² - 18x + 81

Second Step: Multiply by -2

-2 (x² - 18x + 81) = -2x² + 36x - 162

Final Step: Add the constant by 15 in the equation. (Hint: the constant is -162)

-2x² + 36x - 162 + 15

= -2x² + 36x - 147

This is how you convert the function into standard form. Hope this helps.

A scatter plot is shown below. Which equation would best describe the line of best fit for the scatter plot?
y = 2x + 1
y = 2x
y = x + 1
y = -2x - 1 1​

Answers

Answer:

Scatter plot with line of best fit of y equals 0.75x plus five.

The line of best fit is y = 0.75x + 5.

Choose the best representation for the slope.

The slope of the line of best fit shows that each additional minute, the distance increases by 0.75 feet.

The slope of the line of best fit shows that each additional minute, the distance decreases by 5 feet.

The slope of the line of best fit shows that each additional minute, the distance decreases by 0.75 feet.

The slope of the line of best fit shows that each additional minute, the distance increases by 5 feet.

Answer:

it equals i dont know all i want is points

Step-by-step explanation:

need help ASAP like right now

Answers

Answer: =160

Step-by-step explanation:

Volume of prism= 1 1/3 x 5/6 x 2/3 = 4/3 x 5/6 x 2/3 = 20/27

Volume of cube= 1/6 x 1/6 x 1/6 = 1/216

Number Cubes packed in rectangular prism= 20/27 / 1/216 = 160

Answer:

160

Step-by-step explanation:

What kind of symmetry does this figure have?
point
line
both line and point
neither

Answers

Answer:

line and point

Step-by-step explanation:

The kind of symmetry the figure given above posses is a line and point symmetry.

What is point symmetry?

A point Symmetry also known as origin symmetry is a Symmetry which occurs when every part of an object has a matching part. That is, the same distance from the central point but in the opposite direction.

Given that;

The objects looks the same when viewed from opposite directions.

We know that;

A line of symmetry is a line that cuts a shape exactly into two equal half. That is, if you fold the shape along the line, both halves would match exactly.

Therefore, the figure given above has both point and line Symmetry.

Learn more about line and point symmetry:

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Please help me i need this today

Answers

Answer:

I think pounds of sugar cadies not sure though

Step-by-step explanation:

9 lbs of chocolate candies
6 lbs of sugar candies

I need help asap! :')

Answers

Answer:

w=45

Step-by-step explanation:

w = 9 / 1/5

w = 9 x 5

w = 45

Hope that helps!

Answer:

W= 45

Step-by-step explanation:

     

 (1/5 • w) -  9  = 0

       

Help me! Brainliest!

Answers

use the app socratic

Answer:

Rip i saw you said times up :/

Step-by-step explanation:

find the original price

Answers

Answer: $50

Step-by-step explanation:

X is the original price

x -0.25x = 40
0.75x = 40, divide both sides by 0.75
x = 53.34

please help me, i only have 10 point please solve it

Answers

Answer:

Initial value = 19900

Value after 11 years = 1293.87

Step-by-step explanation:

Pleaseee help me
Xxxxx

Answers

Answer:

B

The equation is in slope-intercept form. So that speaking, 4 is the y-intercept.

^ also correct, B!
yayayayay

The options below represent the probability that different events will occur. Which of the options are likely to occur? Select all that apply.

A) 0.47
B) 0.56
C) 0.66
D) 0.71
E) 0.52

Answers

I’m not answering this. You have absolutely zero common sense.

I have to explain the meaning of zero?
Please help, ill give brainly!

Answers

Answer:

0 ( zero) is a number, and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems.

Quadratic functions g and k are shown below.
g ( x ) = 5 x 2 − 12
k ( x ) = 5 x 2 + c

For what value of c will the graph of k be 9 units above the graph of g ?

Answers

636 is the answer for this yup I’m back on my drip
i think the answer is 636

12. A chemist has 40 mL of a solution that is 50% acid. How much water should he add to make
a solution that is 10% acid?
Total Amount x % Acid = Amount of Acid
Total Amount
% Acid
Amount of Acid
Original Solution
Water
New Solution

Answers

Answer:

Volume of pure Acid in -50- LITRES of the solution= 10- litres. Let “V”- litres of water be added, then

Therefore 10= (50+ V) x8/100 .

So 10= 4 + 8V/100

8V/100 = 10–4= 6

So V= 6 x 100/8= 600/8= 75- LITRES.

So on adding 75- litres of water to the acid solution, the percentage of acid drops to 8% .

Check: Percentage of acid in 125- LITRES of acid solution, which contain 10- LITRES if pure Acid

= 10/125 x 100= 8% .

Step-by-step explanation:

Which of the following equations was used to graph the line shown?

A line on a coordinate grid that passes through the points negative 4 comma negative 2, zero comma zero, and 6 comma 3.
A. y = 2x B. y = x ÷ 2 C. y = x + 2 D. y = x – 2

Answers

The answer is B !!!!!
B is the answer
hope this helped

What is the value of the expression shown below?

10 + (2 x 3)2 ÷ 4 × 1 over 2 to the power of 3

11 and 1 over 8
25 and 1 over 6
69
82

Answers

Hellooo!! Marie Here!!!

The answer to this is:

11 1/8  

Explanation:

10 + 6^2 ÷ 4 x (1/8) 10 + 36 ÷ 4 x (1/8) 10 + 9 x (1/8) 10 + (9/8) 10 + 1 1/8 So The answer is A. 11 1/8  (11 and 1 over 8)

Hope This Helps! Have A GREAT Day!!!

11 1/8 because you just have to find the exact answer

Larry invests $100 in a savings plan. The plan pays 4 ½% interest each year on his $100 account balance. How much money will Larry earn in interest after 3 years? After 5 years?

Answers

113.5 and 125.5 I think
Interest = (principal or amount invested) • (interest as a decimal) • (time in years)
I = (100)•(0.045)•(3) = $13.50
and
I = (100)•(0.045)•(5) = $22.50

Pleaaaaaasssseeeeee help me with this

Answers

Answer:

 

Step-by-step explanation:

I’m not sure if I’m correct but I got 28cm

The distance between San Antonio and Austin is 6 inches on the map. If the scale on the map is 1.5 inches is equal to 35 miles. What is the actual distance?

A.210 miles
B.150 miles
C.140 miles
D.100 miles

Answers

Answer:

C. 140miles

Step-by-step explanation:

you would first want to find what one inch equals on the map so you would do 35/1.5 then you would just multiply that by 6 and then that would give you your answer of 140.

A drawing is 12 in. and the actual measurement is 20 ft. What is the scale factor?

A.5/3
B.4/5
C.5/4
D.3/5

Answers

Answer:

d

Step-by-step explanation:

3/5 yesterday I took the picture

IF YOU CAN ANSWER THIS QUESTION I'LL GIVE YOU 25 POINTS. THIS IS FOR NUMBER 6

Answers

Answer:

GO ON CALCULATORSOUP.COM IT WILL SOLVE IT! I HAD THAT QUESTION BEFORE!

Step-by-step explanation:

Answer:

A- rhombus and trapezoid

B- square and rectangle and kite and parallelogram

Step-by-step explanation:

Factor the expression.

Answers

Answer:

1. -4a

2. -4

Step-by-step explanation:

The first problem is 4 x _ = -16a

So it has an a in it and we know 4 x 4 = 16 so it's 4a and its negative so -4a

The second problem is -4

Answer:

-3a/-4

Step-by-step explanation:

so my 1st queation is 80+64w 2 is 40+45n 3 is 6+24z 4 is 28d+42

Answers

Answer:

w is 214656 z is 8657

hope this helps

Step-by-step explanation:

i need help with this math please

Answers

Question one is last option between 8 and 9

Answer:

question 1: it is between 8 and 9. question 2: option B.

Step-by-step explanation:

1. since the closest value that IS a squarable number is 64, the square root of 64 is 8. because 66 is greater than 64, we can estimate that the square root of 66 is between 8 and 9.

2. to solve this, we can take the square root of the numbers to begin.

the square root of 25 is 5 (because 5x5=25)

the square root of 16 is 4

20 is actually not squarable, so we can estimate that it is a little greater 4.

the answer would be √16, √20, 4.85, √25

it would be option b.

hope this helps!! :))

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