If the area of a circle is 40 pi square cm, find the radius.

Answers

Answer 1

area equation is pi*r^2. divide by pi then square root. so the answer is the square root of 40

Answer 2

Answer:

√40 centimeters

Step-by-step explanation:

Given :

Area of circle = 40π cm²

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

Formula for area of a circle :

Area = πr²

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

Equating the given term and formula to find r :

⇒ 40π = πr²

⇒ r² = 40

⇒ r = √40 centimeters


Related Questions

Two angles are complementary. One angle is 30 more than the other angle. Find the value
of both angles.

Answers

Answer:

α=30, β=60

Step-by-step explanation:

we have angles α and β where α + β =90 & β=α+30

this gives us a system of equations that can be solved through substitution

[tex]\alpha +\beta =90\\\beta =\alpha +30[/tex]

substitute to solve for α: α+(α+30)=90

2α+30=90

2α=60

α=30

substitute α to find β:

β=α+30

β=(30)+30 = 60

I realy have been struggling to pay attention in class due to some personal reason so i would realy realy realy appreciate if someone could take a sec out of there day to help me with this... And yes i am aware i should be able to find this easy but no cap i actual cant.

Answers

Answer:

Put it after Russian

Step-by-step explanation:

Also here is some information to help you with commas:

Use a comma after an introductory clause or phrase. ...

Use a comma between all items in a series. ...

Use commas to set off nonrestrictive clauses. ...

Use a comma to set off appositives. ...

Use a comma to indicate direct address. ...

Use commas to set off direct quotations.

Answer:

ended,

Step-by-step explanation:

I believe the comma should come after the word, "ended" in the first sentence

Which amount of money is closest to the 15% tip?
$3.00
$3.50
$4.00
$4.50

Answers

a 15% tip is 3.60 so 3.50 is the closest.

What is the 10th term of the sequence 12, -60, 300

Answers

Answer:

-1500

Step-by-step explanation:

the answer is 300 x - 5

Find the value of x to 2dp in the equation 2x² + 5x = 9​

Answers

Answer:

where x1=-3.71 and x2=1.21

Step-by-step explanation:

first= 2x+5x-9=0, a=2,b=5,c=-9, x=

[tex] \sqrt{ {5 }^{2} } - 4 \times 2( - 9) \: over4[/tex]

second x=

[tex] \sqrt[ - 5 + ]{25 + 72} over4[/tex]

x=

[tex] \sqrt[ - 5 +4 ]{97} [/tex]

[tex] \sqrt[ - 5 - 4]{97} [/tex]

Which data values are outliers for this data? What is the effect of the outlier(s) on the mean? Explain.

Answers

Answer:

working on it

Step-by-step explanation:

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Answers

Answer:

the answer is 41 degrees

Just subtract

180-139

=41

(Please katie im not doing anything wrong)

Step-by-step explanation:

Answer:

∠x=41°

Step-by-step explanation:

Supplementary Angles are angles that equal 180°

1. Use the equation

∠x+∠y=180°

2. Fill in the given values

∠x+139°=180°

3. Solve

Subtract 139 from both sides

∠x+139°=180°

      -139° -139°

4. Answer

∠x=41°

The two trolleys move at a constant velocity what is the magnitude of the acceleration of each trolleys​

Answers

Answer:

0

Step-by-step explanation:

A constant velocity means no speeding up or slowing down. So the acclereation will be 0.

pleas help will give brainliest

Answers

Answer:
J = q x n

Step-by-step explanation:


2 = 6/3
6 =  2x 3
Simple as that
Brainliest pls !
Add friend me if you like more contents like this
Have a good day/ night :>


Stephanie works in retail sales. Her salary is $500 plus 15% commission on
weekly sales.
Write a function expressing the relationship between Stephanie's wages and
her monthly sales.

Answers

The function w(x) = 0.15x + 500 represents the relationship between Stephanie's wages and her monthly sales.

What is a function?

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

Let's suppose the Stephanie's wages is w and weekly sale is x

So we can model a function:

[tex]\rm w(x) = \dfrac{15}{100}x+500[/tex]  or

w(x) = 0.15x + 500

Thus, the function w(x) = 0.15x + 500 represents the relationship between Stephanie's wages and her monthly sales.

Learn more about the function here:

brainly.com/question/5245372

#SPJ1

Please help me with this question I’m not good at math I will give you brainless!!

Answers

Answer:

131.88

Step-by-step explanation:

perimeter = circumference

formula = c=(pi)(d)

d=42

3.14*42= 131.88

How do I solve this problem

Answers

Answer:

#9 24 T-Shirts for $168

#10 the diffirence between 30 T-Shirts and 9 T-Shirts is 147

Step-by-step explanation:

so to get the cost (c) for 1 T-Shirt you need to divide 147 by 21

147 ÷ 21 = 7

so c=7

10x7=70

70x3=210

30x7=210

so 30 shirts cost $210

and 9x7=63

so now it is time to do the rest of the math.

210

-63

147

Have a great day!

Hope this helps!

Brainliest please.

Please fully rate.

Rita rolled a die 25 times. Her results are shown in the table below:

Please help me with this, Please get answer from the table and not by the internet. Thank you! :)

Answers

Answer:

Here I see your answer

Step-by-step explanation:

A lorry travel at 30 km per hour.If it takes 3/4 hour for a certain journey,how long is that journey

Answers

Answer:

22.5 km

Step-by-step explanation:

divide 30 by 4 times it by 3

For f(x) = 3x - 5 and g(x) = x² + 2, find (f+ g)(x).

Answers

Answer:

(f+ g)(x) = x^2 + 3x -3

Step-by-step explanation:

f(x) = 3x - 5 and g(x) = x² + 2,

(f+ g)(x) = 3x-5 + x^2 +2

Combine like terms

(f+ g)(x) = x^2 + 3x -3

(f+g)(x) = x^2 + 3x - 3
Hope this helps^^



(thirteen plus fourteen) minus 17​

Answers

Answer:

10

Step-by-step explanation:

Use The Pemdas Rule

(13 + 14) -17

= 27 -17

= 10

hhhhhhelp me pleaseeeeeeeeeeeeeeeeeeee

Answers

Answer:

2/9

Step-by-step explanation:

First, square the fraction 5/6 to get 1/2 * 25/36 - 1/8. Next, multiply 1/2 and 25/36 to get 25/72. Finally, subtract 1/8 to get the answer 2/9.

Answer:

2/9

Step-by-step explanation:

=> 1/2 (5/6)^2 - 1/8

=> 1/2 (25/36) - 1/8

=> 25/72 - 1/8

=> make 1/8 to have a denominator of 72.

=> multiply the numerator and denominator by 9/9

=> 1/8 becomes 9/72

soo

=> 25/72 - 9/72

=> 16/72

^the greatest common factor is 8

=> 2/9

2/9 is your answer :)

Which of the following is not
necessarily true for all rectangles.

Answers

What are the options?

Here is a picture of a cube, and the net of this cube.

What is the surface area of this cube?

Enter your answer in the box.

mm²

Answers

Answer:

60 ft²

Step-by-step explanation:

in a cube all sides are congruent so you take one measurement and multiply it by the number of sides, so you do 12 × 6 equals 60.

What is the mean of a discrete random variable?

Answers

Answer:

Discrete probability distribution

Step-by-step explanation:

A weighted average of the possible values that random a valuable can take

Solve the system of equations -x + 4y = 6 and 4x – 8y = 0 by combining the equations.

(- x +4y =6)
(4x -8y =0)

-x + 4y = 6
4x - 8y = 0


Answers

Answer:

x=6 y=3

Step-by-step explanation:

Isolate x for -x+ 4y = 6: x= -6+ 4y

Substitute x = -6 + 4y

4(-6+ 4y) - 8y = 0

Simplify

-24+ 8y =0

Isolate y for -24 + 8y = 0: y =3

For x = -6+ 4y

Substitute y =3

X= -6+ 4 × 3

Simplify

X=6

The solutions to the system of equations are:

x=6 y=3


x^2+ (y + 3)^2 = 81

Center:

Area:

Answers

Answer:

Center: 254.5

Area: 254.5

Explanation:

Equation: x² + (y + 3)² = 81

Circle formula:

(x - h)² + (y - k)² = r²

where (h, k) is the center points, r is radius

Rewriting the equation:

(x -0) ² + (y - (-3))² = 9²

Identify the following:

(h, k) = (0, -3), radius: 9

Area of Circle:

π(radius)²  =  π(9)²  =  81π = 254.46 = 254.5

General equation

(x-h)²+(y-k)²=r²

So

(x-0)²+(y+3)²=81(x-0)²+(y+3)=9²

Radius=9

Center=(0,-3)

Area

πr²81π units²

Evaluate the expression below if
a = 8 and b=-5
I a l - I b I

Answers

the answer should be 3 since its the absolute value and thats just how far a number is from 0 so it would be 8-5=3

What is the measure of the unknown angle?

Answers

Answer:

63

Step-by-step explanation:

a entire circle is 360⁰

so you do:

360-297

Answer:

I think its 63

Step-by-step explanation:

Sry if I am wrong. :\

PLEASE HELP! Observe the following quadrilaterals. They each have been labeled with a specific name. Determine if the quadrilateral was given the correct name and explain your reasoning below each quadrilateral

Answers

Rectangle:

If each angles of a quadrilateral is 90 and opposite side are equal then it is a rectangle.

Rhombus:
If in a quadrilateral, opposite angles are equal and all sides are equal, then it is a Rhombus

Answer:

Rectangle:

A rectangle has 4 interior 90° angles and 2 sets of parallel sides (11.2,11.2 and 9.6,9.6) so therefore it was correctly named

Rhombus:

Opposite angles in a rhombus are equal (102° and 102° and 78° and 78°)

and has two pairs of parallel sides; one of these pairs being diagonal lines (13.2,13.2)

PLEASE HELP 10 MINUTES

Answers

Answer:

A

Step-by-step explanation:edg

which scatterplot shows a nonlinear association?

Answers

Answer:

A

Step-by-step explanation:

bc it look goofy dawg. B C and D all have a pattern but A has like no attern dawg

Answer: A.

Step-by-step explanation: Because the dots are everywhere.

Get the binary value of your first name initial. Show your solutions and checking.

First name: Nicy
First name initial: N
Convert: ​

Answers

Answer:

78778887

Step-by-step explanation:

Binary code of the letter N :

⇒ 01001110

Here the character 'N' has the decimal : 78

Change 0 into 7 and 1 into 8 :

78778887

please help pleaseeee

Answers

A) The first option

Hope this helps!

I need help with this cause I wasn’t at school the day we took notes for this!!

Answers

Answer:

1. draw a parallelogram, 2. draw an isoceles triangle (a dash on 2 of the traingles lines to show its equal), 3. equilateral pentagon (a dash on all sides), 4. equilateral octogon (draw dashes on all and draw arrows on pair of parallel sides from 1 arrow to 4 arrows)

Step-by-step explanation:

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