Thursday

October 27, 2016
Number of results: 127,712

**Physics**

A ball on the end of a string travels in a horizontal circle at a constant speed. The circle has a circumference of 3 m, the ball has a speed of 2 m/s, and the centripetal force is 4 N. How much work is done on the ball each time it goes around? A) zero B) 6 J C) 8 J D) 12 J I...

*November 30, 2011 by Crystal*

**math**

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4 pi cm^2 e. 7 1/2 pi cm^2 please answer and ...

*January 5, 2014 by Thomas*

**HELP11**

A line horizontally drawn from the center of the circle. A. Radius B. Axiom C. Circumference D. Vertex A

*February 19, 2012 by kesha*

**Vocabulary**

A line horizontally drawn from the center of the circle. A. Axiom B. Vertex C. Circumference D. Radius D?

*June 3, 2016 by quick help needed*

**Math**

Needing SERIOUS help with circumference and area circle-wise. Help? I'm not really sure where I'm messing up at, but could someone explain all the forumula stuff with area to me in layman's terms?

*April 23, 2008 by Anita Maureen*

**5th grade math **

The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?

*December 7, 2010 by jill *

**math**

A circular disc of area 49π sq. meters rolls down an incline of 88 km length. What is the number of revolution it makes during this journey? i) Area of the circle = πr² = 49π m²; solving r = 7 m. ii) So circumference of the circular disc = 2πr = 14π = ...

*June 14, 2016 by tani*

**Math**

I'm having problems with this question, to tell you the truth I don't understand the problem. Andrew is considering building a clubhouse in the shape of a rectangle. His sketch of the clubhouse is.... (its a drawing of a rectangle with 8 ft at the top and 4 ft on the left end)...

*April 21, 2009 by Lemar*

**pre algebra**

find the circumference and area of a circle if its diameter is 12 feet. round to the nearest tenth.

*June 16, 2010 by lavena*

**pre algebra**

find the circumference and area of a circle if its diameter is 12 feet. round to the nearest tenth.

*June 16, 2010 by lavena*

**10th grade**

If a circle has a diameter of 7inches, what is the circumference rounded to the nearest whole number? Use pi=3.14

*November 18, 2010 by fay*

**geometry**

An army base is enclosed by a wire fence so that it forms a circular compound. The entrance to the base is located at X(3, 6) and the exit is at Y(9, 14). X and Y are end points of a diameter of the circle. A search tower is positioned at Z(2, 13) on the circumference of the ...

*July 11, 2012 by Manda*

**Math**

How do I measure the circumference of a circle without the given radius/diameter? How do I measure the actual distance between Grande Prairie and Medicine Hat? Map Scale: 1:18,300,000

*July 17, 2014 by Lexi*

**Geometry **

Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth.

*September 10, 2009 by Jenny *

**Algebra**

wht is the area of a circle with a circumference of 25 meters? I have to use pi(3.14) and round to the nearest square meter.

*March 30, 2012 by Crystal*

**TRIG**

find the degree measure of a central angle subtended by an arc of 8.00cm in a circle with circumference 20.0cm

*October 2, 2012 by Mel*

**Algebra**

C=6.3r gives the approximate circumference C of a circle as a function of its radius r. Identify the independent and dependent variables in this relationship.

*October 5, 2015 by Mah'Kya*

**Math**

Find the difference between the perimeter of a square of area 1 centimeter square and the circumference of a circle of the same area.

*March 20, 2013 by Emily*

**math**

a circle has a circumference of 110.6mm find diameter to the nearest tenth A.35.2mm b.36.2mm c.37.2mm d.38.2mm

*January 16, 2010 by makeeda*

**Math**

Circle O is centered at the origin and has a radius of 5. Circle O' is the image of circle O after a translation of T1,2. What is the center of circle O'? What is the radius of circle O'?

*March 3, 2010 by Collin*

**math**

27.What is the circumference of the circle below with a radius of 6yd. A.6pi yards B.12pi yards C.18pi yards C.36pi yards pi=3 for me right now

*May 28, 2013 by Jerald*

**summer math hw **

one circle has a diameter of 10 inches. a second circle has a diameter that is twice the diameter of the first circle What is the ratio of the area of the smaller circle to the larger circle

*August 31, 2014 by lesleyy *

**math**

Whats the difference between an arc [of a circle]'s length and measure? And how do you find each of them? The "measure" of an arc is the angle that it subtends from the center of the circle. Call that angle A. The length of the arc is 2 pi R * [A/(2 pi)] = R*A, if A is in ...

*March 20, 2007 by Emily*

**Shape and Space**

The circumference of a mysterious crop circle measure 60 meters. What is the approximate radius,rounded to the nearest meter?

*November 22, 2010 by lululemon *

**geometry**

I don't get this and I need help please. Find the circumference of a circle circumscribed about a square with perimeter 48 ft. ______________ft. (Round to the nearest 0.1 ft.)

*March 19, 2012 by Anonymous*

**Math 10**

What is the circumference of the largest circle you could cut from a 30 cm by 20 cm sheet of paper? What area of paper would you cut away. PLZ HELP GUYS TEST TOMMOROW OH MA GAWD!

*September 14, 2015 by James*

**Math**

4. Columbus had a hard time convincing anyone to undertake the expense of financing a voyage to an unknown place. Based on the information available from other sailors and partly on his own ideas, Columbus underestimated the circumference of the Earth by twenty-one percent. ...

*March 31, 2014 by Sue*

**Math**

Hello, could someone please go over the steps for this question? Thank you! 1. Find the circumference. Leave your answer in terms of pi. The middle line going through the circle is 8.4 (I'm so sorry I don't know the name of the line, brain fart). A) 12.6 pi cm B) 4.2 pi cm C) ...

*April 28, 2016 by Tim*

**6th Grade Geometry Help and A.S.A.P!!**

I forgot so, when calculating a circle's circumference, and area do you measure the circle in inches or centimeters? Also, calculating a rectangular prism's surface area and volume do you use inches or centimeters to measure it? Thanks. Please answer as soon as possible very ...

*April 1, 2015 by MusicLover14*

**Math**

4. Columbus had a hard time convincing anyone to undertake the expense of financing a voyage to an unknown place. Based on the information available from other sailors and partly on his own ideas, Columbus underestimated the circumference of the Earth by twenty-one percent. ...

*April 1, 2014 by Sue*

**Math**

The area of a rectangle is shown below The area of the rectangle is 56 Which of the following are possible values for the length and width of the rectangle? A.length=6cm and width=9cm B.length=7cm and width=8cm C.length=14cm and width=14cm D.Length=28cm and width=28cm B? What ...

*March 6, 2013 by Jerald*

**Geometry **

Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth. would this be 3.14*2*4.2ft?

*September 10, 2009 by Jenny *

**Geometry**

Given circle A with circumference 20 pi and the length of arc KD equal to 10/3 pi. Find the area of the shaded region. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Is there any ...

*March 6, 2011 by Gemma*

**Math**

If the diameter of a wheel is 10 inches. What is the radius and how would I find its circumference. Thanks I do understand that the radius is twice the circumference.

*March 15, 2011 by Americal*

**trigonometry**

Gabe is spending two weeks on an archaeological dig. He finds a fragment of a circular plate that his leader thinks may be valuable. The arc length of the fragment is about 1/6 the circumference of the original complete plate and measures 1.65 inches. A similar plate found ...

*May 28, 2010 by candace*

**Math**

The rim of the basket has a radius of 9 inches. What is the approximate circumference of the basket? Use pi equals 3.14. Explain why 3.14 is used when finding the circumference of a circles.

*May 16, 2015 by Kimmy*

**Math**

Find the area for the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd 22. Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the raduis is 23 yd

*January 31, 2013 by Jman*

**math **

the inner circumference of a ring is 1.2pi cm. the outer circumference of the ring is 2pi cm. find the area of the region bounded by the outer and inner circumference.

*January 8, 2012 by Randy*

**Math2**

The scale of a globe is 1/8 inch= 125 miles. How many inches is the circumference of that globe? Hint 1: Circumference means distance around. Hint 2: Use 25,000 miles for the circumference of the Earth.

*October 21, 2015 by DK*

**Pre-Algebra**

Here are some more: 1.Use transformations to solve the equations: 5{6+k}=3k 19-3m+ 5+7m <0 2.Find the circumference of a circle with diameter 31 m. 3.What is 186% of 750? Thanks!! -MC

*May 1, 2009 by mysterychicken*

**Rai**

A particle covers an angle of 120¡ã while moving along the circumference of a circle. Find distance and displacement.

*August 19, 2016 by Prabhat*

**Physics**

A particle covers an angle of 120¡ã while moving along the circumference of a circle. Find distance and displacement.

*August 19, 2016 by Prabhat*

**math**

suppose you copy the circle using a size factor of 150%.what will bet he radius,diameter,circumference,and the area of the image? radius will be 1.5 times as big diameter will be 1.5 times as big but the formula for area will be pi times the radius squared. So calculate that ...

*October 26, 2006 by chemiii*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...

*March 21, 2013 by Jossie*

**Geometry**

In my book there's a picture of an equalderal triangle. This is given information. Inside the triangle all three altitudes have been drawn to find the center point of gravity. The incircle is drawn. The circumcircle is drawn. Given that the radius of the incricle is 1, what is...

*May 15, 2008 by Geometry*

**Math**

The diameter of the planet Saturn is about 75,000 miles. The circumference of the planet can be found using the formula C=3.14d . What is the circumference in scientific notation ? Use 3.14 for ratio

*December 10, 2015 by Susy*

**math**

the radius of a circle when the numeric values of the circumference and area are equal. circumference = 2*pi*r area = pi*r^2 Set them equal and solve for r. thanks! i understand it now! 2*3.14*r=3.14*r^2 6.28*r=3.14*r^2 r=3.14 Is that right? It doesn't seem to be. 2*3.14*r=3....

*October 25, 2006 by christina*

**Pre-Calc (Circles)**

Describe the conditions necessary, where circle A has a larger radius than circle B, for the two circle to have no points of intersection, while circle B is entirely in the interior of circle A.

*November 17, 2009 by Anonymous*

**Math**

True or false Some rational numbers are integers. The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function

*November 22, 2013 by KGK*

**Math**

Some rational numbers are integers. True or false The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function.

*November 22, 2013 by KGK*

**math**

Find the area for the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd 22. Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth.

*February 10, 2014 by melissa*

**stats**

the head circumferences of adult males have a bell-shaped distribution with the mean= 65cm and standard deviation =2cm. a. what is the head circumference such that only 2.5% of adult males have a smaller head circumference? b. what is the head circumference such that only 2.5...

*October 9, 2012 by jenny*

**7th grade**

if I have the circumference of a circle how do I find the diameter, and how do I find the radius

*January 6, 2009 by shaquahia*

**Geometry **

The circumference of a circle changes from 20 to 4 after a dilation. What was the scale factor of the dilation? A. 1/25 B. 1/5 C. 5 D. 25

*March 2, 2014 by anon*

**geometry**

A circle has a circumference of 12. It has an arc of length 8/5 What is the central angle of the arc, in degrees?

*April 19, 2016 by Jd Daza*

**maths**

find the circumference of a circle whose radius is: 1. 8 inches 2. 4 inches

*July 11, 2013 by leena : aww maths !!! help me*

**AP Calculus**

The radius of a circle is decreasing at a constant rate of 0.1 centimeters per second. In terms of the circumference C, what is the rate of the area of the circle, in square centimeters per second? a. -(0.2)pie C b. -(0.1)C c. -(0.1)C/2 pie d. (0.1)^2C e. (0.1)^2 pie C

*January 18, 2011 by Naz*

**AP Calculus**

The radius of a circle is decreasing at a constant rate of 0.1 centimeters per second. In terms of the circumference C, what is the rate of the area of the circle, in square centimeters per second? a. -(0.2)pie C b. -(0.1)C c. -(0.1)C/2 pie d. (0.1)^2C e. (0.1)^2 pie C

*January 18, 2011 by Naz*

**Calculus**

The circumference of a circle is increasing at a rate of 2pi/5 inches per minute. When the radius is 5 inches, how fast is the area of the circle increasing in square inches per minute? A. 1/5 B. pi/5 C. 2 D. 2pi E. 25pi

*March 14, 2015 by Anonymous*

**math**

Two chords in a circle are equal in lengh.The distances from the centre of the circle can be represented by x2 and 4x respectively.How far is it chord from the centre of the circle?[Under the topic of properties of a circle.]

*January 19, 2016 by Gift*

**Maths**

There are 17 points on the circumference of a circle how many lines can be drawb to connect all possible pairs of points?

*May 12, 2016 by Harley*

**Math**

Three circular pipes with 30cm diamters are strapped together. Find the length of the strap to the nearest centimeter. I got the circumference of the circle which is 94.25cm but that's where i got stuck. Can you please help? you are wrong sorry to tell ya. the circumfrence of ...

*April 4, 2007 by Shay*

**geometry**

Circle O above has a circumference of 240 cm and arc XW has a length of 60 cm. What is the measure of the central angle associated with arc XW?

*March 6, 2011 by jake*

**Math **

A square measures 12 cm x 12 cm and is divided into four equal squares.If equal circles inscribed within each of the four squares, what is the circumference of each circle ?

*August 7, 2014 by Feras*

**algebra**

Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and porportion to complete the following table. hat size Head circumference 7 1/4 (to nearest 1/5inch) 7 1/8 22 4/5 Head circumference (to nearest centimeter) 58

*November 17, 2011 by lisa*

**Physics**

A particle of mass m1 is tide to a string and describes a circumference on a horizontal plane. The string (of negligible mass)passes through a hole that is in the center of the plane and goes down vertically. At the lower end is tied another particle of m2. If the first ...

*November 11, 2012 by Leslie*

**math**

A square measures 12 cm x 12 cm and is divided into four equal squares. If equal circles are incribed within each of the four squares, what is the circumference of each circle ? a. 2 pi cm b. 4 pi cm c. 6 pi cm d. 8 pi cm e. 12 pi cm please answer and explain

*January 5, 2014 by Thomas*

**Astronomy**

Calculate the approximate circumference of Earths orbit around sun, assuming that orbit is a circle with radius of 1.5 X 10 to the eighth.

*June 11, 2014 by Kandice*

**maths**

since a rectangle forms two area of a circle shouldn't it also form two circumference in a cylinder

*August 15, 2015 by jay*

**math**

the center of three congruent small circles are collinear, and their diameters form the diameter of the large circle, shown, whose area is 81 pi units. what is the circumference of one of the smaller circles? express your answer in simplest radical form.

*October 20, 2011 by arch*

**math**

(a) A circle has centre at (−2,−1). One point on its circumference is (−2, −3). Find its radius, correct to 1d.p. (b) If y = x2 for 0 £ x £ 2 is completely rotated round the x – axis, find the volume of the solid of revolution produced.

*September 8, 2016 by bliss*

**Geometry**

Hello, Can you please tell me if I have the correct answer? Thank You my answer: 6m Find the diameter of a circle whose circumference is 18.85m.

*April 9, 2008 by Mandi*

**trig**

Points X, Y, and Z are on the circumference of a circle with radius 2 such that <YXZ = 45 degrees and <XZY = 60 degrees. Find the area of triangle XYZ.

*December 7, 2013 by Anonymous*

**Math**

3.)Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. A.)16.0 mm B.)26.4 mm C.)8.4 mm d.) 33.5 mm 4.)Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth. Diameter = 42.0 mm a) ...

*December 1, 2015 by YRN DJ*

**circles**

if the circumference is estimated c=3*d and the exact circumference is c=pi*d what would be the radius and the diameter

*September 16, 2012 by gissell*

**math **

I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...

*May 4, 2013 by Ed*

**math**

I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...

*May 5, 2013 by Hannah*

**geometry**

how do you find the circumference of a circle with the area of 169 pie m squared(in the terms of pie)? Please tell me how to do it. Don't just give me the answer

*January 12, 2009 by jordan*

**6th grade math**

There are three crowns in the royal cabinet: One for the King, One for the Queen, and one for the Princess. The king's circumference was 21.98 in, the Queen's circumference was 43.96 cm and the Princess' circumference as 392.5 mm. What are the Diameters's for all three crowns?

*April 27, 2011 by Ann*

**math**

The radius of a circle in increasing at the rate of 0.5cm/s. Find the rate at which the circumference increases if the radius in 5cm.

*May 8, 2016 by David *

**Circumference,Radius, Diameter**

What is the area of the circle if the radius is 2 cm? A. 3 cm squared B. 6 cm squared C. 10 cm squared D. 12 cm squared I don't really know the answer to this one because I am not sure what the formula for area of a circle is. If I knew the formula the maybe I could figure the...

*March 24, 2008 by Missy*

**math**

can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...

*December 28, 2011 by steev*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...

*March 21, 2013 by Jossie*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...

*March 21, 2013 by Jossie*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...

*March 21, 2013 by Jossie*

**Math (Ms.Sue)**

Find the circumference of a circle whose area is 452.16 square meters. (Use 3.1416 as the value of π.) A. 12 meters B. 75.3984 meters C. 24 meters D. 37.6992 meters I don't know what formula to use for this equation.

*September 15, 2015 by Brooklyn *

**Chemistry**

The circumference of the earth is 25,000 mi at the equator. What is the circumference in kilometers? in meter? -- I really don't understand how to concer this. Please help!

*July 21, 2008 by Jecce*

**math**

diameter of coin is 26 mm in length find circumference & area of coin.Is 13 the answer for circumference of coin?

*July 23, 2012 by Barb*

**math**

18.Ms. Jones has a garden plot that measures 40ftX 20ft If she increases the garden by 4 ft on each side, by what percent has she increased the plot? 19. A cylindrical can of cleaner holds 1 L of liquid. What is its height if the diameter of the base is 10 cm? 20. Find the ...

*August 28, 2010 by Anonymous*

**math**

a rectangle has a perimeter equal to circumference of a circle of radius 3. if the width of the rectangle is 3, what is the length? a) 3pi-3 b) 4.5pi-3 c)6pi-3 d)9pi-3 e)cannot be determined 3*2*pi=3+3+2x where x=side of rectangle 6pi-6=2x 3pi-3=x

*June 23, 2005 by Christine*

**geometry**

IF d equal 18 cm what is the circumference and what is the circumference to the second power.

*June 18, 2010 by glo*

**science**

If the head circumference is 22.75in what is the uncertainty in circumference?

*March 11, 2011 by karrimah*

**5th grade Math**

I have a review question that says: The formula for the circumference of a circle is C = pi x d, where d represents the circle's diameter. Which statementis correct? Would it be D? Wasn't sure if a diameter could have a decimal or fraction. A. the formula only works if d is 1 ...

*March 27, 2012 by Brandi*

**algebra**

Find the circumference and the area of a circle with diameter 5cm . Use the value 3.14 for π , and do not round your answers. Be sure to include the correct units in your answers.

*December 1, 2015 by Anonymous*

**Math**

Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string, in simplest form? ...

*April 20, 2009 by Ashfia*

**Math**

Cindy has two fourths of a circle and three tenths of a circle. What does she need to make a whole circle?

*October 26, 2009 by Juanita*

**math**

The tangent from point T touches a circle at R.If the radius of the circle i 3cm and T is 5cm from the center of the circle.Calculate/TR/.

*September 17, 2011 by Raha *

**math**

Simplify each expression blow: (a). 18.5 - (4.8 + 0.2)² + 4.1 2= (b). 11.35 + (0.2 3.5 )² - 3.7= ©. On a business trip, Jason bought the following amounts of gasoline: 15.4, 12.2, 13.8, and 10 gallons (gal). How much gasoline did he purchase on the trip? (d...

*January 10, 2009 by rosland*

**Precalculus**

The figure shows part of a curve traced by a point on the circumference of a circle of radius 4 that rotates, without slipping, around a fixed circle of radius 2. The rotating circle starts with angle t = 0 radians and the point P (x, y) at (10, 0). In this problem you will ...

*January 20, 2012 by Anon*

**Math**

The center of a circle is A(-3,3) an B(1,6) is in the circle. Find the area of the circle in terms of pi. a^2 + b^2 = c^2 radius is 5 and 25pi

*January 23, 2012 by J.R.*