Wednesday

April 23, 2014

April 23, 2014

Number of results: 10,663

**math**

I assume this is calculus class. Volume= PI*radius^2*h h= volume/(PI*radius^2) Surface=PI*radius^2*2 + PI*radius*height Surface= PI*radius^2 * 2 + PI*radius*volume/(PI*radius^2) Take the derivative of surface with respect to radius, set it to zero, and solve for radius.
*Monday, February 4, 2008 at 8:03pm by bobpursley*

**math**

how do i get the area of a circle????????????? area of a circle=pi * radius * radius huh what huh radius is the measuremnt from the center of the circule so Pi also known as 3.14 multiplyed by radius squared or known as radius times radius
*Thursday, October 26, 2006 at 9:22pm by chemiii*

**Physics**

torque= force*radius torque*radius= mass*radius^2 * angular acceleration linear acceleraltion=angularacceleration*radius
*Wednesday, November 17, 2010 at 11:06am by bobpursley*

**Computer Science (Basics)**

public class Circumference { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ; final double PI = 3.14159; int radius = 10; double area = PI * radius *radius; double circum = 2 * PI * radius; System.out.println("The area of a ...
*Sunday, September 14, 2008 at 3:38pm by Mike*

**geometry**

. Which of the following circles would show the locus of points in a plane 1 unit from the intersection of the lines x + y = 2 and x â€“ y = 4? a. center (4, 2), radius = 1 b. center (3, â€“1), radius = 1 c. center (3, 1), radius = 1 d. center (0, 0), radius = 1
*Tuesday, September 28, 2010 at 4:46am by faty*

**AP Physics**

I will be happy to critique your thinking on this. You do not need the radius, because you are dealing with fractions of energy. When you work out the KE, radius will be there, and the same radius term will be in the rotational energy part, and the radius terms divide out.
*Friday, February 8, 2008 at 6:41pm by bobpursley*

**Physics**

The first sentence is all you need. arc distance=radius*angleinRadians 2.5=radius(35deg*PIrad/180deg) radius=4.09 m
*Wednesday, November 19, 2008 at 11:51am by bobpursley*

**Math-geometry**

I gave you the formula for area of a spherical triangle given the excess angle, and the radius of the object. re is the radius of Earth. rm is the radius of the moon.
*Saturday, March 9, 2013 at 11:59pm by bobpursley*

**CHEM****

Decreasing atomic radius means, to me, that we list the lagest radius first and the smallest radius last. That is the way they are listed above which is what the problem asked for. I don't understand why decreasing atomic radius and decreasing atomic size are not the same, at ...
*Tuesday, November 13, 2007 at 8:04pm by DrBob222*

**Calc**

The radius of a sphere is increasing at a rate proportional to its radius. If the radius is 4 initially, and the radius is 10 after two seconds, what will the radius be after three seconds? dR/dt = c R Integrating this differential equation gives you ln R/Ro = c t R/Ro = e^(ct...
*Thursday, March 1, 2007 at 5:33pm by Mischa*

**math**

C)radius circumference = 2*Pi*radius Diameter = 2*radius Since Pi is approximately 3,14, the circumference is approximately 6,28 times bigger than the radius. The diameter is 2 times as big as the radius
*Monday, October 27, 2008 at 2:41pm by Christiaan*

**physics help ; )**

A 200kg satellite is circling the earth in an orbit of radius 7.0x10^6 m in radius. At this radius the acceleration due to gravity is 8.2 m/s2. The speed of the satellite is?
*Tuesday, November 14, 2006 at 6:14am by chico*

**Calculus**

Cost=.01*area of Al + .02*area of ends 300=.01*PI*radius*2*height+.01*PI*2*radius^2 Use that to find height as a functionof radius. Now Volume=PI*radius^2 * Height set dVolume/drad =0 and solve for radius, then go back and solve for height.
*Monday, December 15, 2008 at 12:36am by bobpursley*

**Physics**

distance will be proportional to radius. (perimeterofCircle=PI*2*radius) difference in perimeters=2PI*(20-15) so that distance is the how far behind should the inner radius be.
*Wednesday, September 25, 2013 at 2:50am by bobpursley*

**8th grade**

write each radius from the problem situation as a power. radius of 8-inch drumhead: r = radius of 18-inch drumhead: r = radius of 16-inch drumhead: r =
*Wednesday, April 14, 2010 at 8:57pm by Anonymous*

**physics class-Help!!!**

torque is radius X Force sin theta Torque 1 and 2 have angles of 90 degrees making it equal to 1. Torque 1:0.6 (radius of 1.2) X 6.0 N Torque 2:1.5 (radius of 3)X 5.2 N Torque 3:1.5 (radius of 3)X 5.2 N sine 30 degrees Torque 1 + Torque 2 + Torque 3 = Net Torque 3.6 + 7.8 + 3....
*Wednesday, July 16, 2008 at 11:40pm by Steph*

**7th grade**

Circumference = 2 (pi) radius That is (2) times (3.14) times the (radius) The radius is half of the diameter
*Monday, November 9, 2009 at 6:57pm by Haley*

**physics**

Derive the equation for velocity ratio: radius a, radius b, radius c IMA or velocity ration = (2c)/(b-a)
*Saturday, February 19, 2011 at 3:05am by Geoffrey*

**7th grade**

Circumference = 2 (pi) radius That is (2) times (3.14) times the (radius) The radius is half of the diameter
*Monday, November 9, 2009 at 6:57pm by Helper*

**Chemistry**

The reactivity of the halogens increases as one goes UP the table; i.e., F is the most reactive and I is the least. The smaller the radius the easier it is to ADD an electron to make the outside shell have eight electrons. F is the smallest radius and I is the largest radius.
*Monday, September 8, 2008 at 1:05pm by DrBob222*

**Calculus I**

*Optimization problem* [I don't know how to get to the answer] Problem: You have a cylindrical can with radius 4cm and height 10cm. Inside is a marble with a radius that has to be larger than 0 but less than 4 cm (even the largest marble will fit entirely). You're filling it ...
*Monday, November 12, 2012 at 1:11am by Ken*

**chemistry**

I may have missed something here but if the radius of the atom is 10,000 times the radius of the nucleus, then if the radius of the nucleus is 1", then the radius of the atom is 10,000". Convert that to meters.
*Thursday, December 1, 2011 at 12:45am by DrBob222*

**math**

That probably means that the radius is 3.75. The circumference of a circle is found by multiplying pi times the diameter. Since the radius is only half of the diameter, we need to use twice the radius or 7.5 feet C = 3.14 * 7.5 C = ?
*Wednesday, September 16, 2009 at 5:59pm by Ms. Sue*

**Math. Help me please!**

both have radius 7. What do you mean larger circle? Are there circles surrounded by a larger? If so, then the radius must be when x is zero, y goes from y-3=-7 or y=-4 to y-17=+7 or y=24 diameter= 28, radius= 14 area= PI (r)^2
*Thursday, April 14, 2011 at 6:23pm by bobpursley*

**Calculus**

4. At time t, t>0, the volume of a sphere is increasing at a rate proportional to the reciprocal of its radius. At t = 0, the radius of the sphere is 1 and at t = 15 the radius is 2. a. Find the radius of the sphere as a function of t. b. At what time t will the volume of ...
*Tuesday, February 14, 2012 at 6:23am by Anonymous*

**MATH; linear equation?**

radius; another word for the bone that connects the elbow and wrist. don't get this confused with the radius of a circle, this has NOTHING to do with that... A woman with an arm radius of 22 centimets long should be about 160 centimeters tall. A woman with a radius of 26 ...
*Wednesday, January 9, 2008 at 7:51pm by amazinggg*

**Algebra**

The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie] A. What is the circumference of a circle with a radius of 2 m? B.What is the area of a circle with a radius of 2 m? C. The earth has a radius ...
*Monday, September 17, 2007 at 5:28pm by Jordan*

**Math**

Right. The radius is 2.5 So you can see that the diameter is double the radius. or you can say the radius is 1/2 the diameter.
*Wednesday, February 20, 2013 at 7:26pm by JJ*

**MONGU COLLEGE**

a. depends on the radius...arclength=angle*radius b. area=angle* radius^2 /2
*Thursday, February 28, 2013 at 5:00pm by bobpursley*

**Physics**

a) diameter = 2*radius = 0.15 m; radius = 0.15/2 area = pi*radius^2 b)Work = Force*distance = 160*0.15
*Saturday, November 10, 2012 at 12:47pm by Jennifer*

**Calculus**

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius i am guessing the radius is either x or x/2 but i am still not sure..CAN someone help me plz? PLZ HELP ME...i dont know where to start Take the ratio of two succesive terms and take ...
*Monday, May 7, 2007 at 10:49am by Maria*

**geometry**

In a circle with centre P,a chord AB is parallel to a tangent & inersects the radius drawn from a point of contact at the midpoint of the radius .If AB=12,FIND THE RADIUS OF THE CIRCLE.
*Thursday, July 14, 2011 at 1:54am by Mahek*

**geometry**

In a circle with centre P,a chord AB is parallel to a tangent & intersects the radius drawn from a point of contact at the midpoint of the radius .If AB=12,FIND THE RADIUS OF THE CIRCLE.
*Thursday, July 14, 2011 at 1:54am by Mahek*

**Pre-Calc**

Determine the center and the radius of the following circle: x^2+y^2+6x-4y-5=0 I got for the radius 3(sqrt2) I got for the center (-3,2) Can you please tell me if I am correct? The radius seems wierd.
*Tuesday, September 29, 2009 at 11:34pm by MUFFY*

**physics**

[radius (perpendicular) * sin35º] / [radius perpendicular*cos 35º] -the radius cancel and your left with.... sin35º / cos35º =.70 is the coefficient of static friction
*Monday, April 1, 2013 at 8:05am by Josh*

**physics**

Find the speed of a satellite in a circular orbit around the earth with a radius 2.69 times the mean radius of the earth; Radius Earth= 6.37E+3km; Mass Earth= 5.98E+24kg.
*Tuesday, March 11, 2014 at 7:51pm by Marie*

**Tcc**

change speed to m/second, radius to meters tangential speed=angular velociyt*radius you are given tangential speed, radius, solve for angular velocity w radial acceleration= w^2*radius tangential acceleration: zero
*Thursday, April 10, 2014 at 4:43pm by bobpursley*

**Physics**

Distance runners often run around an approximately circular trajectory. However, since some runners are running at a larger radius than others, they must be given an advantage in the beginning so that the race is fair. If the path of the runner running at a greatest radius of ...
*Wednesday, September 25, 2013 at 2:50am by Akshat121*

**algebra**

how do you write and solve an equation to determine the radius of mars the radius of earth is 6378.1 km, which is 2981.1 km longer than the radius of mars
*Saturday, September 12, 2009 at 1:10pm by delisa*

**physics**

Kepler: the ratio of the squares of the period is equal to the ratio of the cubes of the mean distances. Period^2/1year= (radius/re)^3 2^2=4=(Radius/re)^3 radius= re*cubroot4
*Sunday, April 24, 2011 at 7:48pm by bobpursley*

**8th grade math**

it the radius of M is 3x the radius of P, then the area is 9x (remember area is proportional to radius squared). So, if P is 27, then M is 27*9
*Monday, January 5, 2009 at 5:48pm by bobpursley*

**CALC**

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius and interval of convergence... so far i am guessing that radius is equal to x and interval of convergence is (-infinty to positive infinity) is that correct? You need to do a ratio ...
*Monday, May 7, 2007 at 4:28pm by Maria*

**physics**

Two solid spheres A and B are made from the same material. The mass of sphere B is eight times that of sphere A. If the radius of sphere A is 7.50 cm, what is the radius of sphere B? [Volume of a sphere of radius r is given by V = 4ðr63/3]
*Tuesday, January 19, 2010 at 7:05pm by Mandy*

**Physics**

Calculate the position of the center of mass of the following pairs of objects. Use acoordinate system where the origin is at the center of the more massive object. Give youranswer not in meters but as a fraction of the radius as requested. Get data from insidethe front cover ...
*Tuesday, February 28, 2012 at 9:08pm by john*

**calculus**

1. The radius of a sphere is r inches at time t seconds. Find the radius when the rates of increase of the surface area and the radius are numerically equal. A 1/4π in B 1/5π in C 1/3π in D 1/8π in E 1/2π in
*Wednesday, March 20, 2013 at 5:10am by Anonymous*

**college physics**

Two solid spheres A and B are made from the same material. The mass of sphere B is eight times that of sphere A. If the radius of sphere A is 7.50 cm, what is the radius of sphere B? [Volume of a sphere of radius r is given by V = 4ðr63/3]
*Tuesday, January 19, 2010 at 7:21pm by Mandy*

**college physics**

Two solid spheres A and B are made from the same material. The mass of sphere B is eight times that of sphere A. If the radius of sphere A is 7.50 cm, what is the radius of sphere B? [Volume of a sphere of radius r is given by V = 4ðr63/3]
*Tuesday, January 19, 2010 at 7:21pm by Mandy*

**Calculus**

A spherical balloon is inflated at a rate of 10 cubic feet per minute. How fast is the radius of the balloon changing at the instant the radius is 4 feet? And The radius of a circle is decreasing at a rate of 2 ft/minute. Find the rate at which the area is decreasing with ...
*Friday, August 26, 2011 at 1:27pm by Branden*

**geometry**

Write an equation for each circle if the coordiantes of the center and length of the radius are a. center(-1,-5) radius = 2 units b. center(0,3) radius = 7 units c. center(-9,7) radius = 1/2 units
*Sunday, April 29, 2012 at 12:04am by lindsay*

**Physics Please help!**

Calculate the position of the center of mass of the following pairs of objects. Use acoordinate system where the origin is at the center of the more massive object. Give youranswer not in meters but as a fraction of the radius as requested. Get data from insidethe front cover ...
*Tuesday, February 28, 2012 at 11:08pm by john*

**Physics**

tangential linear speed= angular speed*radius=4.2 rad/s*12cm= ... centripetal acceleration= v^2/radius= w^2*radius= 4.2^2 * 12cm/s^2
*Thursday, April 10, 2014 at 5:01pm by bobpursley*

**Physics**

The kinetic energy of the proton is (1/2) m v^2 Therefore (1/2) m v^2 = 745 volts * charge of proton That gives you v, the speed of the proton. Now use your force on a particle in a magnetic field to get the radius of path (if you do not have the equation in your book) If you ...
*Monday, February 25, 2008 at 5:27pm by Damon*

**Physics**

it didnt let me put the link to image.. A tube of radius 5 cm is connected to tube of radius 1 cm as shown above. Water is forced through the tube at a rate of 10 liters/min. The pressure in the 5 cm tube is 1×105 Pa. The density of water is 1000 kg/m3. Assume that the water ...
*Tuesday, April 27, 2010 at 7:21pm by Chris*

**physics**

A satellite circles the earth in an orbit whose radius is 2.01 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?
*Monday, October 8, 2012 at 6:25pm by sammy*

**Phyiscs**

A satellite circles the earth in an orbit whose radius is 2.07 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?
*Sunday, June 30, 2013 at 8:50pm by Justin S.*

**math**

Sorry, this question is a typical college level calculus question. For a seventh grader, it is a little harder. Try this. Graph Surface area vs radius according to the equation I gave you... Surface= 2*PI*radius^2 + 100/radius You will see a graph that has a minimum. If you ...
*Monday, February 4, 2008 at 8:03pm by bobpursley*

**math**

a spherical balloon with radius r inches has volume V9r) =(4/3)πr^3. Find a function that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r+1 inches
*Sunday, September 12, 2010 at 10:29pm by Sasha*

**Maths**

how did u get this step.130 pi cm^2 = pi(r1^2 + r2^2) ======================== ^ means "to the power" so r^2 = radius squared pi r^2 = pie times radius squared = area of circle of radius r
*Sunday, August 21, 2011 at 12:40am by Damon*

**Math/Statistics**

A simple dartboard has three areas…the main board has a radius of 8 inches, there is a circle with a radius of 6 inches, and the bullseye has a radius of 4 inches. What is the probability of a random dart landing inside the bullseye?
*Sunday, May 1, 2011 at 5:18pm by Rodney*

**Calculus**

A spherical balloon with a radius "r" inches has volume V(r)=(4/3)(pi)(r^3). Find the function that represents the amount of air required to inflate the balloon from a radius of "r" inches to a radius of r+1 inches.
*Saturday, September 22, 2007 at 2:59pm by Raj*

**math**

A spherical balloon with radius r inches has volume V (r) = 4 3 r3 . Find the function f(r) that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r + 2 inches.
*Thursday, May 5, 2011 at 9:07pm by Renaldo Nguyen*

**chemistry**

The radius of an atom is about 10,000 times as large as its nucleus. If the atom were enlarged such that the radius of its nucleus was 1 inch, what would be the radius of the atom in meters? I need the formula to follow so that I can solve this problem.
*Thursday, December 1, 2011 at 12:45am by george*

**algebra**

the weight of a symetry ball varies directly with the cube of it's radius a ball with the radius of 2 inches weighs 5.60. find the weight of a ball with a 3 inch radius
*Wednesday, April 18, 2012 at 8:48pm by jennifer*

**serious math help!!!!!!!!!!!**

The radius is 1/2 of the diameter, which is the width all the way across. Area = pi x radius^2 Circumference = pi x diameter If you have the radius, you can figure you the circumference. Circ = pi x 2 x radius Vice versa for Area if you have the diameter (divide that by 2 and ...
*Tuesday, January 8, 2008 at 8:04pm by MattsRiceBowl*

**physics**

A 17.0-kg satellite has a circular orbit with a period of 2.31 h and a radius of 9.10×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.10 m/s2, what is the radius of the planet? radius = m
*Friday, July 16, 2010 at 7:26pm by Sam*

**Math**

A simple dartboard has three areas the main board has a radius of 9 inches there is a circle with a radius of 5 inches ans the bullseye has a radius of 3 inches What is the proability of a random dart landing inside the bullseye Round to the nearest 1000th
*Monday, April 16, 2012 at 2:03am by Jeff *

**Java programming**

List all overloading methods (including constructors) in this coding.. public class Circle { private double radius; private String colour; public Circle() { radius = 0; colour = ""; } public Circle (double r) { radius = r; } double getRadius() { return radius; } double getArea...
*Tuesday, April 16, 2013 at 11:59am by nina*

**Calculus**

A spherical balloon with a radius r inches has volume V(r)= 4/3 Pi r^3. Find a function that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r+1 inches. An explanation would be appreciated, as I have no clue how to even begin.
*Saturday, September 11, 2010 at 6:04pm by Chelsea*

**geometry**

area of cone = 1/3 r^2 (radius) * pi* height so, we get diameter = 2 radius, so radius = 4. so, 4^2 * pi = 16pi. Multiply this by 1/3 then by 9 to get 48 pi as the area of cone a. Cone b has a diamter of 12. so, the radius is 6, and r^2 = 36. then we get 36pi for the base and ...
*Thursday, March 21, 2013 at 5:34pm by Knights*

**calculus**

3. The radius r of a sphere is increasing at a constant rate of 0.04 centimeters per second. (Note: The volume of a sphere with radius r is v=4/3pir^3 ). a. At the time when the radius of the sphere is 10 cm, what is the rate of increase of its volume? b. At the time when the ...
*Tuesday, January 3, 2012 at 12:02am by Yoona*

**Algebra**

The area of a circle is given by the formula A+pier^2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100pie square inches, what is the radius of the original circle?
*Monday, March 12, 2012 at 8:41pm by Savannah*

**math**

Are you sure the radius is 14"? That sounds more like diameter, which would make the radius 7". Regardless, let me give you some help so you can figure out the answer. Circumference = radius times 3.14 times 2 There are 5280 feet in a mile. With this info, you should be able ...
*Wednesday, July 22, 2009 at 12:42pm by MsPJ*

**physics**

Zero, a hypothetical planet, has a mass of 3.0*10^23 kg, a radius of 3.0*10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0*10^7 J, what will be its kinetic energy ...
*Sunday, April 8, 2007 at 7:34pm by ben*

**Math**

(a) A sphere of radius 4 in is inscribed in a cone with radius 6 in. How tall is the cone? (b) A cone with radius 4 in is inscribed in a sphere of radius 6 in. How tall is the cone? Show that there is more than one answer to this question.
*Thursday, August 19, 2010 at 11:09am by John*

**Math**

Circle C has radius 4 inches. Circle D had radius 9 inches. These two circles are connected. Point A,B,and E are points of tangency. Find AB. From point C to point D(which is the radius of circle C plus the raduis of circle D) it is 13 inches. From point C to point A (radius ...
*Friday, April 29, 2011 at 11:27am by Greg*

**Physics**

(c) What is the radius of the circle of its flight when the bat flies at its maximum speed? answer in m Remember horizontal component = m v^2/r and therefore sin A = 1.7/r That Angle for minimum radius = 80.4 at 10m/s so r = 1.7 / sin 80.4 r = 1.72 meters is minimum turn radius
*Saturday, March 13, 2010 at 7:28pm by Damon*

**Math**

Because diameter is twice the radius, the radius must be 1/2 of 8 ft. So r=4ft. The circumference is equal to 2*pi*radius. Since pi is =3.14 Thus by comparing the two equations D=2r C=2rpi the only difference is pi so the answer would be F if you assume 3.14 is approximately 3
*Thursday, March 8, 2012 at 10:02pm by Anon*

**Physics**

you measure the diameter of a circle then you calculate the radius of the circle using this diameter. (1) Which one has a greater uncertainty, the diameter or the radius? Why? you measure the radius of a circle then you calculate the diameter of the circle using this radius. (...
*Friday, June 29, 2012 at 10:49pm by Denji*

**Physics**

When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of...
*Wednesday, December 18, 2013 at 1:56am by Bernice Nicole*

**Physics**

When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of...
*Wednesday, December 18, 2013 at 4:14am by Bernice Nicole*

**Geometry**

radius 1 = 1 radius 2 = 1+3 = 4 radius 3 = 4+1 = 5 radius 4 = 5+2 = 7 radius 5 = 7+.75 = 7.75 circumference 1 = 2π(1) = 2π circumference 5 = 2π(7.75) = 15.5π difference in circumference = 15.5π - 2π= 13.5π = appr. 48.7 inches
*Wednesday, May 16, 2012 at 12:34am by Reiny*

**Algebra**

You were correct, when you cut the radius in half, the volume will be 1/8 of the original. When you triple the radius, the new volume will be 27 times that of the original. Look at what happens when we substitute the new radius for r sub in 3r for the radius V = (4/3)π(3r...
*Sunday, March 21, 2010 at 12:58am by Reiny*

**physics**

The weight of the satellite at the surface of the planet is GmM/R^2, where G is the universal constant of gravity. (Look it up if you don't know it); m is the satellite's mass (5850 kg) R is the planet's radius (4.15*10^6 m) M is the mass of the planet. You will need to use ...
*Sunday, December 2, 2007 at 3:43pm by drwls*

**Math-Algebra**

When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of...
*Wednesday, December 18, 2013 at 6:29am by Bernice Nicole*

**Geometry**

What is the circumference of the circle if the radius is: 5x-My answer was 57(x)pi. What is the radius if the circumference is: 30x(pi)-My answer was 2x. (x + y)pi -My answer (x+y)/7. What is the length of the arc if: radius=3 degree of measurement of arc=6- My answer was pi/9...
*Monday, June 14, 2010 at 12:59am by Temperance*

**calculus**

At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.1 }{1 t + 5} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 27 seconds using the following steps: When substituting...
*Saturday, March 8, 2014 at 5:59pm by ricky*

**calculus**

At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.4 }{3 t + 6} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 16 seconds using the following steps: When substituting...
*Saturday, March 8, 2014 at 6:00pm by Marcus*

**physics**

synchronous? Would it travel one revolution per day? Period=24 hr=24*3600seconds speed=2PI*radius/period. Now we know gravity is the attractive force...and it equals centripetal force. GMeMs/r^2=Ms*v^2/rad GM3Ms/r^2=Ms (2PI radius/period)^2/radius and you can solve for orbital...
*Friday, March 1, 2013 at 4:42am by bobpursley*

**Physics - Astronomy**

What (decimal) fraction of a hypothetical spherical planet's volume does a planetary core with a radius of 70% of that planet's radius have? Round off answer to three decimal places. [Hint: the volume of a sphere is equal to 4/3 pi times the radius cubed]
*Thursday, November 15, 2012 at 12:50am by Leslie*

**College math**

Highway curves If a circular curve without any banking has a radius of R feet, the speed limitL.in miles per hour for the curve is L=1.5 R. (a.)Find the speed limit for a curve having a radius of 400 feet. (b.) If the radius of a curve doubles, what happens to the speed limit...
*Thursday, April 28, 2011 at 3:15pm by Shin*

**geometry**

since you have neglected to mention the radius of the paper circle, it's hard to give a numeric answer. Suffice it to say that since 1/4 of the paper has been removed, the radius of the cone's base is 3/4 the radius of the original paper circle.
*Friday, April 27, 2012 at 2:29pm by Steve*

**calculus**

A snowball has a radius of 3 inches. Assume the rate with which the volume of the snowball melts is proportional to its surface area. If, after 1 hour, the radius of the snowball is 2.9 inches, predict what the radius will be after one day.
*Sunday, September 9, 2012 at 5:57pm by Tyler Stranburg*

**Math (Variation)**

The cost of a pizza varies directly as the square of its radius. If a pizza with a 6-inch radius costs ₱148.00, how much should a pizza with an 11-inch radius cost?
*Tuesday, February 11, 2014 at 8:33am by Shin*

**calculus**

A candy company needs a custom box for their truffles. The box they've chose is in the shape of a cylinder with a hemisphere of the same radius on top. The total volume of the box is V= (1/2) ((4pir^2)/(3))+ pir^2 (y-r), where y is the height of the box and r is the radius of ...
*Friday, January 4, 2013 at 2:16pm by Equihua*

**College Physics**

A bowling ball (mass = 4.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.35 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other? What equation should I use with this since ...
*Wednesday, March 14, 2012 at 8:56pm by Anonymous*

**algebra**

You have been put in charge of making pizza for the fundraiser. You are told to make the larger pizzas with a radius 3 less than twice the radius of the smaller pizzas. The difference in the area of the pizzas is to 24 pi. Find the radius of the smaller pizza.
*Wednesday, May 4, 2011 at 6:42pm by zainab*

**Calculus**

A snowball has a radius of 3 inches. Assume the rate with which the volume of the snowball melts is proportional to its surface area. If, after 1 hour, the radius of the snowball is 2.9 inches, predict what the radius will be after one day. using separation of ordinary ...
*Sunday, September 9, 2012 at 11:55pm by Tyler*

**MATHS**

What is Radius if Angle at centre is 150 and Arc length is 220 What is radius if Angle at centre is 270 and Area is 1848 What are area and Angle at circle if Radius is 14 and Arc length is 55 What is radius if Angle at centre is 75 and Area is 154
*Saturday, February 27, 2010 at 2:59am by ARKI*

**Honor Physics**

Please provide the units of your physical quantities. Is the radius in meters or feet? Is the revolution time in seconds or minutes? Use the radius and rotation rate to get the horizontal velocity at the top of the rotation. Use the radius and height of the wheel to get time ...
*Tuesday, September 15, 2009 at 1:26am by drwls*

**Computer Science 40**

Please help me with this homework assignment. I tried everything and it still didn't work. The question is: Use three variables volume, radius, and height to write a program that can be use to calculate the volume of a cylinder. Formula: volume = radius x radius x 3.14159 x ...
*Monday, January 17, 2011 at 10:39am by Mailo Her*

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