# draw a plane containing 4 coplanar points A, B, C, and D, with exactly 3 collinear poinys A, B, and D

20,434 results, page 16-
## geometry

I really need help on this question: Determine whether each conjecture is true or false.Give a counterexample for any false conjecture. Given:Wx=XY Conjecture:W,X,Y are collinear. PlEASE HELP!!!

*asked by Rick on September 13, 2012* -
## atoms

If i was to draw a diagram of a hydrogenatom with one electron and its many spectral lines would i need to draw the BOhr model with the nucleus in the middle and 3 outer rings or have i lost the plot That is one way. Actually, there are an infinite number

*asked by bex on February 14, 2007* -
## physics

You spot a plane that is 1.63 km north, 2.3 km east, and at an altitude 5.2 km above your position. 1) At what angle from due north (in the horizontal plane) are you looking? ( ) °E of N 2) Determine the plane's position vector (from your location) in

*asked by amanda on February 17, 2018* -
## Math I Have no idea PlEASE help me

Wind can affect the speed of an airplane. Suppose a plane is flying round-trip from New York City to San Francisco.The plane has a cruising speed of 300 miles per hour.The wind is blowing from west to east at 30 miles per hour. When the plane flies into

*asked by carina on December 23, 2014* -
## Math

1) A plane is located at C on the diagram. There are two towers located at A and B. The distance between the towers is 7,600 feet, and the angles of elevation are given. a) find BC, the distance from Tower 2 to the plane, to the nearest foot. b) find CD,

*asked by Tim on April 11, 2016* -
## magentism

6.A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? b. What is the magnitude of the

*asked by anton on November 19, 2013* -
## electricity and magnetism

A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque

*asked by Jason on November 22, 2013* -
## electromagnets

A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque

*asked by Anton help needed on November 20, 2013* -
## magnetism

A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque

*asked by James on November 20, 2013* -
## Math

Craig scored 12 points in a game. Marla scored twice as many points as Craig but 5 fewer points than Nelson scored. How many points did Nelson score? a. 2x12+5 b. 2 x 12 -5 c. 1/2 x 12 + 5 d. 2 x (12 + 5) Answer-b Can you please check on the above.

*asked by Patrick on February 17, 2016* -
## Science 8R - Ms. Sue Please Help!!!!

Homework - Draw a picture of an atom is there any pictures of an atom I can easily draw, please help

*asked by Laruen on November 15, 2012* -
## physics pls help

Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as E=(24î + 60j + 70k) N/C; the flux through a 1.5m² potion of the illuminated plane is

*asked by jay on May 29, 2016* -
## physics

Suppose that a block with mass 40 kg is sliding down a frictionless inclined plane slanted at a 37 degree angle. Find how fast it is accelerating across the inclined plane.

*asked by Desiree on October 22, 2010* -
## High School Geometry

I am have a hard time understanding how A and B can be No, but C can be Yes on this problem i.imgur (dot)com/rpJQDf3.png I thought that since AD is not perpendicular to the plane m then no lines shooting off of D onto the plane could be perpendicular.

*asked by Ben on November 14, 2013* -
## physics

a body of massb20kg slides down a plane inclined at 30degree to the horizontal if a constant resting force of 40N act on the body it acceleration down the plane is what?

*asked by favour on November 25, 2016* -
## trigo

A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

*asked by carl on November 22, 2015* -
## physics college level

A 2.0-kg block is projected up a frictionless inclined plane with a speed of 10 m/s. The angle of inclination is 30o . The block goes a distance of _____ up the plane before stopping. Assume g = 10 m/s2

*asked by spencer on April 2, 2014* -
## PHYSICS

a 17 of model plane is flying at a horizontal speed of 14 m/s the plane goes into a dive and levels off 21 m closer to the earth what was the ammount of potentiomal energy lost in the dive

*asked by landon on January 7, 2010* -
## Math

A plane passes directly over you head at an altitude of 500 feet. Two seconds later you observe that is angle of elevation is 42 degrees. How far did the plane travel in 2 seconds?

*asked by Baby D on March 2, 2009* -
## physics

Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as E=(24î + 60j + 70k) N/C; the flux through a 1.5m² portion of the illuminated plane is

*asked by jay on May 29, 2016* -
## Trigonometry

A plane is headed due east with airspeed of 240 mph. if a wind at 40 mph is bloiwing from the north , find the ground speed of the plane.

*asked by Roy on September 9, 2012* -
## Physics

Due to a strong wind from the west of 65 km/h, a plane ends up traveling 330 km/h [W 15 S] relative to the ground. What was the magnitude of the velocity of the plane relative to the air in km/h?

*asked by Anonymous on July 8, 2014* -
## physics

a wooden slab starting from rest slide down a 10m long inclined plane with acceleration of 5m per sec what would be the speed ay the bottom of the inclined plane

*asked by manoj kumar on May 30, 2014* -
## Physics 11 URGENT STEVE OR BOB OR ANY PHYSICS Guys

An 42 kmph wind blows towards 215 degrees while a plane heads towards 125 degrees at 152kmph. What is the resultant velocity of the plane? tenks vry much!!!!!!!!!!!!!!!!!!!

*asked by Urgent Smith on October 16, 2016* -
## 11th grade physics

You place a box with a mass of 20kg on an inclined plane that makes a 35.0° angle with the horizontal. What is the component of the gravitational force acting down the inclined plane?

*asked by Johnaton on November 2, 2010* -
## PHYSICS~~~

How much work is needed to push a 142- kg packing crate a distance of 2.45 m up an inclined plane that makes an angle of 20 o with the horizontal, when inclined plane is frictionless?

*asked by Steve on March 22, 2012* -
## physics

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?

*asked by Ashley on October 19, 2013* -
## physics

A block has a mass m=6.9-kg and lies on a fixed smooth frictionless plane tilted at an angle of 24.4 to the horizontal. Determine the acceleration (in m/s2)of the block as it slides down the plane.

*asked by wanda on September 16, 2017* -
## Math

A weight of 150 lbs is placed on a smooth plane inclined at an angle of 24° with the horizontal. What is the required force needed to prevent the weight from sliding down the plane?

*asked by Alexa on July 30, 2015* -
## physics

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?

*asked by Ashley on October 19, 2013* -
## Physics...help please!

Unlike a ship, an airplane does not use its rudder to turn. It turns by banking its wings: The lift force , perpendicular to the wings, has horizontal component, which provides the centripetal acceleration for the turn, and a vertical component, which

*asked by Cesar on April 7, 2011* -
## Math- Multi-step word problems

A plane traveling from Phoenix to Washington, D.C with a tailwind of 20 miles per hour takes 3 hours. The return trip in the same wind, which is now a headwind, takes the same plane 3 hours and 12 minutes. What is the average speed of the plane in calm

*asked by Kitty on October 1, 2014* -
## Precalculus

1.A plane takes off at an angle of 6 degrees traveling at the rate of 200 feet/second. If it continues on this flight apth at the same speed, how many minutes will it take to reach a n altitude of 8000 feet? 2. A plane takes off at an angle of 5 degrees.

*asked by Ms. Suzie on March 2, 2009* -
## physics

a 25.0kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. the coefficient of kinetic friction between the box and the inclined plane is 0.200. determine the force of kinetic friction acting on the

*asked by Anonymous on March 16, 2012* -
## physics

An electron of charge -e and a long straight wire carrying a current I to the right are both in the plane of the page, as shown above. In the position shown, the electron is a distance R from the wire and is moving directly toward it with speed v. What is

*asked by roga on May 26, 2014* -
## physics

a force of 625 N is used to move an object with 1000N resistance up inclined plane of 2.0 m.What is the length of the inclined plane

*asked by Lee on February 13, 2012* -
## physics

How do i find the length of a projection of a vecor A=3x+y+2z on the xy plane? and how do i find the unit vecotr in the xy plane that is perpendiculer to vector A?

*asked by larry on October 30, 2014* -
## physics

A block accelerates at 3.3 m/s2 down a plane inclined at an angle 27.0. m μk 3.3 m/s2 27 Find μk between the block and the in- clined plane. The acceleration of gravity is 9.81 m/s2 .

*asked by james on November 10, 2013* -
## science

a 50 kg block is placed on an inclined plane with an angle of 30. then find the components of the weight (1)perpendicular (2)parallel to the inclined plane.

*asked by shahanshah on August 9, 2016* -
## physics

How do i find the length of a projection of a vecor A=3x+y+2z on the xy plane? and how do i find the unit vecotr in the xy plane that is perpendiculer to vector A?

*asked by larry on October 28, 2014* -
## physics

a plane on a runway accelerates from rest for 6.8 seconds. If the runway is 450 meters long, what was the plane's acceleration?

*asked by jeneva on October 19, 2011* -
## Physics

I want to lift a 90kg box using an inclined plane, but I only have 30kg of strength. What does the length and height of the inclined plane need to be?

*asked by Sammy on June 2, 2015* -
## Physics

The drawing shows a jet engine suspended beneath the wing of an airplane. The weight W of the engine is 12000 N and acts as shown in the drawing. In flight the engine produces a thrust T of 54200 N that is parallel to the ground. The rotational axis in the

*asked by Annie on October 21, 2012* -
## Calculus

A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5

*asked by George on November 12, 2008* -
## algebra

Hi Dear Jiskha team, I have Algebra homework and I will need some help. The homework is following: Suppose you are using a computer to draw a face on a coordinate plane. The eyes are at (–3, 3) and (3, 3). The tip of the nose is at the origin. To make a

*asked by Lily on February 22, 2012* -
## chemistry

I know you are unable to draw things on this website, but I am in desperate need for help and was wondering if someone would be able to guide or help me. I need to draw and assign the expected proton NMR spectra for the following compounds and show

*asked by sam on October 27, 2008* -
## chemistry

I know you are unable to draw things on this website, but I am in desperate need for help and was wondering if someone would be able to guide or help me. I need to draw and assign the expected proton NMR spectra for the following compounds and show

*asked by sam on October 27, 2008* -
## Physics

Your younger brother who wishes to be a pilot reads a news article about a search and rescue plane. In this search and rescue operation, an ultra-light aircraft travelling north at 30 km/hr encounters a 40 km/hr crosswind. After explaining to him that a

*asked by Annabeth on August 19, 2014* -
## calculus

A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and

*asked by Daniel on March 5, 2012* -
## Essay

What main points do you think I should include in my essay ("Why I should be in this advanced class")? I've written most of it. The topic was so general that I am not sure that I've hit all the points I should have. Could you provide some points that you

*asked by Anonymous on February 24, 2008* -
## fizik

b) A ball of mass 3.5 kg starts from rest and slides down a rough inclined plane 60 cm long in 0.6 s. i) Calculate the net force acting on the object along the inclined plane

*asked by mimi on April 11, 2011* -
## physics

A pilot heads her plane with a velocity of 275 km/hr north. If there is a strong wind of 130 km/hr blowing east, what is the magnitude of the velocity of the plane in reference to the ground.

*asked by jarrod on March 5, 2014* -
## Math

I have a few questions. 1) If a sphere is intersected by a plane that contains the center of the sphere, what would it look like? 2) Can the intersection of a plane and cylinder be a triangle? What is a hemisphere?

*asked by Emily on April 18, 2007* -
## Physics

The initial velocity of a 2.75 kg block sliding down a frictionless inclined plane is found to be 1.25 m/s. Then 1.05 s later, it has a velocity of 5.31 m/s. What is the angle of the plane with respect to the horizontal? I keep trying to use sine and

*asked by Emily on February 18, 2016* -
## phsyics

The block shown in figure below lies on a smooth plane tilted at an angle è = 21.5° to the horizontal. Determine the acceleration of the block as it slides down the plane. Ignore friction.

*asked by Tiffany on October 28, 2015* -
## physics

what force parallel to an inclined plane of height 3 meter and base 4 meter can just support a block mass 500 gram on the plane ? the coefficient of friction 0.25

*asked by Adarsh on July 1, 2014* -
## physics

An airplane needs at least 145 meters of runway to take off. If the plane starts from rest and accelerates uniformly to a take-off speed of 170 km/hr then what is its acceleration in meters/second? How long does it take for the plane to become airborne?

*asked by John on September 22, 2011* -
## Physics

A solid disk is released from rest and rolls without slipping down an inclined plane that makes an angle of 25.0° with the horizontal. What is the speed of the disk after it has rolled 3.00 m, measured along the plane?

*asked by Sam on October 29, 2010* -
## Physics

A box weighing 215 N is placed on an inclined plane that makes a 55 degree angle with the horizontal. Compute the component of the gravitional force acting down the inclined plane.

*asked by Jim on November 29, 2010* -
## Physics

a 25 kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. The coefficient of kinetic friction between the box and the inclined plane is 0.200. a. determine the force of kinetic friction acting on the

*asked by Allie on February 25, 2012* -
## Calculus

An airplane is heading at a bearing of N23°E at a speed of 700 km/hr, but there is a wind blowing from the west at 60 km/hr. If the plane does not make any correction, what will be the bearing of the plane? What is its speed relative to the ground (ground

*asked by Alexa on July 29, 2015* -
## algebra

In a college, some courses contribute more towards an overall GPA than other courses. For example, a science class is worth 4 points; mathematics is worth 3 points; history is worth 2 points; and English is worth 3 points. The values of the grade letters

*asked by john on October 18, 2010* -
## Statistics

The points of 100 children in a test are normally distributed with mean of 25 points and a standard deviation of 10 points. (a)Given that the passing mark is 20, estimate the number of children who passed the test. (b)If 5.59% of the children obtain a

*asked by John on October 15, 2014* -
## Chemistry

How would I draw the abbreviated structural formulae of the products of the complete hydrolosis of this compound, CH3 O (=) N - C - CH - NH2 (-) (-) H CH3 CH3 Sorry about the drawing, the bonds in brackets should be vertical, thanks. We simply can't draw

*asked by Ben on February 21, 2007* -
## calc help showed work

If the function f has a continuous derivative on [0,c], the the integral(o to c) of f'(x)dx= a)f(c)-f(0) b)absolute value (f(c)- f(0)) c) f(c) d)f'(x)=c e)f"(c)-f"(0) My work: so the the answer to the integral is f(x) and when find the answer from o t0 c,

*asked by david on December 8, 2006* -
## Physics

A block P of mass 2.75 kg is lying on a rough inclined plane of angle è=0.87 radians. Block P is attached via a model string that passes over a model pulley to a second block Q of unknown mass M kg hanging vertically. The coefficient of static friction

*asked by Anonymous on March 6, 2012* -
## math

A sphere has a radius of 12 inches. A horizontal plane passes through the center of the sphere. A)Describe the cross section formed by the plane and the sphere. B)Describe the cross sections formed as the plane intersects the interior of the sphere but

*asked by Tim on December 3, 2015* -
## physics

An object is located 30 cm to the left of a converging lens whose focal length is 50 cm. (a) Draw a ray diagram to scale and from it determine the image distance and the magnification. (b) Use the thin lens and magnification equations to verify your answer

*asked by Daniel on March 21, 2012* -
## ela

i have to draw globe thetre but i have no idea how to draw. they give me some describsion:the stage was 4-5 feet high,surrounded by railing,. the celing above the stage, supported by two colums,was painted with the sun,moon,stars and zodiac sign and more

*asked by anu on November 5, 2010* -
## Pre Calculus

For a vector $\bold{v}$, let $\bold{r}$ be the reflection of $\bold{v}$ over the line \[\bold{x} = t \begin{pmatrix} 2 \\ -1 \end{pmatrix}.\] [asy] unitsize(1 cm); pair O, V, R; O = (0,0); V = (3,1); R = reflect(O,(2,-1))*(V); xaxis(-2,4); yaxis(-3,1);

*asked by Bob on September 21, 2017* -
## algebra

In a coordinate plane, the points (2,4) and (3,-1) are on a line. Which of the following must be true? 1. The line crosses the x-axis. 2. The line passes through (0, 0). 3. The line stays above the x-axis at all times. 4. The line rises from the lower left

*asked by Eric on March 30, 2013* -
## Physics

A plane is flying southwest at 155 mi/h and encounters a wind from the west at 45.0 mi/h. What is the plane's velocity in respect to the ground in standard position? I know the answer, but can't figure out how to get the answer. Any help would be

*asked by A on January 24, 2013* -
## Algebra II

The heading of a plane is 27.7 degrees NE, and its air speed is 255 mi.h. If the wind is blowing from the south with a velocity of 42.0 mi/h, find the actual direction of travel of the plane, and its ground speed.

*asked by Arielle on November 2, 2011* -
## physics

A 5kg block is placed on an inclined plane raised to an angle with it just started to slip down. if its coefficients of friction is 0.3 calculate. and the speed of the block up to the plane if it is being pull up by a force of 30N

*asked by holamyde on December 29, 2014* -
## physics

if a charged plane has a uniform surface charge density of −1.5×10−7C/m2 , what is the magnitude of the electric field just outside the plane’s surface? Express your answer to two significant figures and include the appropriate units.

*asked by jrfannin on February 5, 2014* -
## math

the axes are rectangular and a point P moves on the fixed plane lx+my+nz=p.the plane through P perpendicular to OP meets the axes in A,B,C parallel to YOZ,ZOX,XOY intersect in Q.show that the locus of Q is p{1/x2+1/y2+1/z2}=l/x+m/y+n/z

*asked by manjula on January 20, 2013* -
## Physics

A block of mass 4.6 kg slides 15 m from rest down an inclined plane making an angle of 20 o with the horizontal. If the block takes 10 s to slide down the plane, what is the retarding force due to friction?

*asked by Steve on February 21, 2012* -
## physics

After landing, a jetliner on a straight runway taxis to a stop at an average velocity of -33.0km/h . If the plane takes 8.00s to come to rest, what are the plane’s initial velocity and acceleration?

*asked by Anonymous on September 5, 2013* -
## physics

An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s, in what direction should the plane head to reach its destination?

*asked by Anonymous on October 19, 2009* -
## analytical geometry

the axes are rectangular and a point P moves on the fixed plane lx+my+nz=p.the plane through P perpendicular to OP meets the axes in A,B,C parallel to YOZ,ZOX,XOY intersect in Q.show that the locus of Q is p{1/x2+1/y2+1/z2}=l/x+m/y+n/z

*asked by manjula on January 16, 2013* -
## Precalculus

1. A plane takes off, making an angle of a = 17° with the ground. After the plane travels m = one mile along this flight path, how high (in feet) is it above the ground?. (Round your answer to one decimal place.)

*asked by Anonymous on December 13, 2010* -
## college physicalscience

the air speed of a plain is 223km/h and the pilot keeps the plane pointed north. A wind is blowing73.6km/h from the west. Determine the speed (in km/h) of the plane relative to the ground

*asked by tiana on September 20, 2010* -
## physics

a box slides down a smooth inclined plane 30m long and 10m high.determine the speed of the box at the bottom of the plane if it starts from rest at the top.

*asked by Anonymous on July 4, 2011* -
## physics

A plane landing on a small tropical island has just 50 m of runway on which to stop. If its initial speed is 47 m/s, what is the maximum acceleration of the plane during landing, assuming it to be constant? Answer in units of m/s 2 .

*asked by mahnoor on November 18, 2016* -
## Physics

A block slides from rest from the top of a plane 8m long and inclined 35o with the horizontal. If the coefficient of friction is 0.20, find how long it will take the body to reach the bottom of the plane.

*asked by Dan Ira King on November 26, 2017* -
## Physics

A ship fires its guns with a speed of 400 m/s at an angle of 35 with the horizontal. a. Find the range and maximum altitude. b. If the ship hits a plane that was 12 km away, how high was the plane flying?

*asked by Anonymous on November 7, 2015* -
## Physics

An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s, in what direction should the plane head to reach its destination?

*asked by Alex on February 7, 2015* -
## Pre-Calculus-Trig

A pilot in a plane at an altitude of 22,000 feet observes that the angle of depression to a nearby airport is 26 degrees. How many miles is the airport from a point on the ground directly below the plane?

*asked by Chloe Mack on January 30, 2011* -
## Physics

A plane landing on a small tropical island has just 80 m of runway on which to stop. If its initial speed is 65 m/s, what is the maximum acceleration of the plane during landing, assuming it to be constant? Answer in units of m/s 2

*asked by Kyle on November 12, 2015* -
## Geometry/Trig

A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.

*asked by Anna on March 3, 2014* -
## Math

What cross sections might you see when a plane intersects a cone that you would not see when a plane intersects a pyramid or a prism? Explain.

*asked by Anonymous on March 9, 2016* -
## Math

A plane flew an estimated distance of 800 kilometers. The greatest distance the plane could have flown is

*asked by Berry on September 3, 2013* -
## trig

a plane is 50000 ft in the air and 30000 ft from an airport find the angle of depression from the plane to the airport

*asked by baylee on April 9, 2014* -
## Calculus 3

Find the equation of the plane that passes through (1,0,0) and is perpendicular to the line r=+t. The vector equation of a plane is n*(r-rsub0)=0. Thank you so much for your help!

*asked by Heather on January 24, 2013* -
## math

a small plane flying into the wind takes 3 hrs 20 min to complete a flight of 960 km. Flying with the wind the same plane takes 2 h 30 min to make the trip.what is the speed of the plane? what is the speed of the wind?

*asked by mathhy on September 23, 2010* -
## Physics

A 5.0 kg wooden block is placed on an adjustable inclined plane. (For this problem, μs is approximately 0.55 and μk is approximately 0.25) a) What is the angle of incline above which the block will start to slide down the plane? b) At what angle of

*asked by Yuki on October 12, 2011* -
## Physics

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. Assume the plane is traveling horizontally with a speed of 195 km/h (54.2 m/s). How far in advance of the recipients (horizontal distance) must the goods be

*asked by Bridge on September 18, 2011* -
## PHYSÝCS I

A crate of oranges slides down an inclined plane without friction. If it is released from rest and reaches a speed of 4.883 m/s after sliding a distance of 2.01 m, what is the angle of inclination of the plane with respect to the horizontal? Please note:

*asked by ADRÝAANA on March 1, 2012* -
## physics

A crate of oranges slides down an inclined plane without friction. If it is released from rest and reaches a speed of 4.883 m/s after sliding a distance of 2.01 m, what is the angle of inclination of the plane with respect to the horizontal? Please note:

*asked by lissa on March 2, 2012* -
## Probability -- Help?

Sampling one at a time with replacement from a bag with 8 blue, 7 red, and 5 green. What is the probability of getting at least two red in 3 draws? The book says the probability is 0.2818 but doesn't explain why. Any help???? Unfortunately, the probability

*asked by Cheri on December 1, 2006*