## Most Popular Questions of 2010

1. ### chemistry

Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate

asked by ej on October 11, 2010
2. ### language arts

IN the poem “Swift Things are Beautiful” by Elizabeth Coatsworth reveals that every thing is beautiful in its own way. Although the title says that only swift things are beautiful, the poet also lists slow things that are beautiful. She uses unusual

asked by Hannah on April 25, 2010
3. ### Chemisty.....Help =))

What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) --> ZnCl2(aq)+ Cu(s)

asked by Lisa, Help needed! on December 7, 2010
4. ### geometry

How do I find the surface area of a sphere with a radius of 8cm?

asked by billy on May 25, 2010
5. ### chemistry

what volume (in ML) of a 0.150 M HNO3 solution is required to completely react wtih 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) --> 2NaNO3(aq) + H2O(l) then, in the reaction above,

asked by samantha on June 21, 2010
6. ### College Chemistry

I balanced the equation: HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation

asked by KELLY on October 3, 2010
7. ### PHY

Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in Figure 4-46. The sum of the forces A and B exerted on the unit by the horizontal cables is parallel to the line L, and FA = 4300 N. Determine FB and the magnitude of

asked by AMI on September 13, 2010
8. ### physics

You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0 m above the ground, it is travelling at 25.0 m/s upward. Use the work-energy theorem to find a) its speed just as it left the ground; b) its maximum height.

asked by anton on February 21, 2010
9. ### Physics

A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the drive steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. a) What is the magnitude of the force of the car on the truck? b) what is the

asked by Sarah on June 12, 2010
10. ### english/CHECK

My answers 1) Assail 2)Banal 3)mercenary 4)allusion 5)Taint 6) appease 7)Arbitrary 8)syndrome 9)altruistic 10)euphemism MY OLDER BROTHERS MARK HAS NO LUCK WITH WOMEN, HE GOES INTO ONE OF TWO STYLES OF CONVERSATION. THE FIRST IS TO (1) TAINT HER WITH A

asked by jae on September 1, 2010
11. ### english

this check my answer Words: Deterrent, implication, inequity, infirmity, infringe, innovation, revitalize, sparse, subjective, succinct, 1- 2 When the candidate for mayor saw the sparse turnout for his speech, he knew he had to do something to revitalize

asked by jae on August 30, 2010
12. ### Chemistry...Help!!

I don't even know how to start this...The valence electron configurations of several atoms are shown below. How many bonds can each atom make without hybridization? 1. Si 3S2 3P2 2. P 3S2 3P3 3. F 2S2 2P5

asked by Stacy on November 6, 2010
13. ### chemistry

What is the complete ionic equation for CaS(aq) +CuCl2(aq)=CuS(s)+CaCl2(aq)

asked by lupe on April 8, 2010
14. ### Chemistry

Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NOREACTION. Are my answers below correct? I used the textbook 1. sodium chloride and lead (II) acetate

asked by Jerry on October 5, 2010
15. ### math

asked by boo on October 26, 2010
16. ### Physics

An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.26). The bullet remains in the block, and after the impact the block lands 2.00 m from the bottom of the table. Determine the initial

asked by having trouble on November 21, 2010
17. ### Physics

A ball is thrown straight downward with a speed of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 seconds after it is released? GIVEN: Vi = 0.50 m/s Vf = ? d = 4 m t = 0.70 s

asked by Priscilla on February 2, 2010

Thomas Kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. Thomas’s fastest moving inventory item has a demand of 6000 units per year. The cost of each unit is \$100.00, and the

asked by Jackson on September 20, 2010

what do you call someone who cant turn pancakes?

asked by ben on October 6, 2010
20. ### physics

a 20 kg loudspeaker is suspended 2m below a ceiling by two 3m-long cables that angle outward at equal angles. what is the tension in the cables?

asked by sam on November 11, 2010
21. ### Algebra 1

asked by Zachary on March 9, 2010
22. ### Algebra 2

Find the values of the 30th and 90th percentiles of the data 18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20 * 30th percentile = 9 90th percentile = 20 * 30th percentile = 9 90th percentile = 19 * 30th percentile = 11 90th

asked by Skye on May 24, 2010
23. ### chemistry! URGENT!!!

A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 365 mmHg?

asked by chelsey on December 6, 2010
24. ### English

Identify the pronouns in each sentence. Then decide if each is nominative (N), objective (O), or possessive (P). 1. Why wasn't he invited to Anila's party? 2. I hope Anila left me directions to her house. 3. My sister will pick us up after Anila's party.

asked by Sarah Perez on October 10, 2010
25. ### math

did you hear about..... p.188 PRE-ALGEBRA WITH PIZZAZZ

asked by blargwork on October 4, 2010
26. ### physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 95-m at a speed of 80 km/h.

asked by Anonymous on February 7, 2010
27. ### physics

A string is wrapped around a uniform solid cylinder of radius r. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Note that the positive y direction is downward and

asked by Gabe on January 22, 2010
28. ### spanish

Querida Beth: 1) (blank) esta todo bien y esperamos que 2) (blank) tambien lo este. 3) (blank) lo pensemos y lo conversemos, tu padre y yo no estamos contentos con tu viaje. 4) (blank) en nuestras vidas estamos muy preocupados porque creemos que eres mu

asked by kyle on October 20, 2010
29. ### AP Chemistry

In a saturated solution of Zn(OH)2 at 25 degrees Celsius the value of [OH-] is 2.0x10^-6M. What is the value of the solubility-product constant, Ksp, for Zn(OH)2 at 25 degrees Celsius? A. 4x10^-18 B. 8x10^-18 C. 1.6x10^-17 D. 4x10^-12 E. 2x10^-6 Help?

asked by Anonymous on March 9, 2010
30. ### Chemistry

How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products? 2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g) 3-CH3OH & 3-O2 or 1-CH3OH & 6-O2 or 4-CH3OH & 2-O2

asked by Jazmin on April 2, 2010
31. ### physics

What is the tension in the rope of this figure description? 60 kg person is hanging in the air on a rope attached to a pulley, with a 100 kg mass attached on other end that is touching the ground.

asked by Sarah on June 13, 2010
32. ### physics

A space station, in the form of a wheel 110 m in diameter, rotates to provide an "artificial gravity" of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) that will

asked by laura on July 10, 2010
33. ### chem

In a solution prepared by mixing CH3OH with H2O the major species pesent are 1. a. CH3+, OH, and H2O 2. b. CH3O, H+, and H2O 3. c. CH3OH and H2O 4. d. CH3OH, H+, and OH I know i have to get an equation having trouble doing that!! please help!!

asked by Mark on April 24, 2010
34. ### chem

AgNO3+NaOH-->AgOH+NaNO3 give me molecular , total ionic and net ionic???"

asked by julia on November 9, 2010
35. ### Chemistry!!

A chunk of silver has a heat capacity of 42.8 J for 1ºC and a mass of 181g. Calculate the specific heat of silver.

asked by Meg Hat on May 21, 2010
36. ### Calculus

A piece of wire 40cm long is cut into two pieces. One piece is bent into the shape of a square and the other is bent into the shape of a circle. How should the wire be cut so that the total area enclosed is a) a maximum? /b) a minimum? Perimeter of square

asked by sh on January 20, 2010
37. ### chemistry

Predict whether the following solutions are acidic, basic, or nearly neutral: a. NaBr, b. K2SO3, c. NH4NO2, d. Cr(NO3). the answer is neutral, basic, acidic, acidic and i am not sure why

asked by jin on July 4, 2010
38. ### Implicit Differentation-Cal

if sin(xy)=x, then dy/dx=

asked by Anonymous on March 23, 2010
39. ### Chemisty

Using the equation Zeff = Z - S and assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant, S, calculate Zeff for the 2p electrons in F^- and Na^+ Repeat this calculation using Slater's rules to

asked by Jerica on April 5, 2010
40. ### PHySics

A 1.63 nF parallel-plate capacitor is charged to an initial potential difference ΔVi = 100 V and then isolated. The dielectric material between the plates is mica, with a dielectric constant of 5.00. (a) How much work is required to withdraw the mica

asked by Physics on May 12, 2010
41. ### Geographyand socity

1. _______________________ is the science of predicting the weather. (1 point) Climatology Ecology Meterology Botany 2. _______________________ is the condition of the atmosphere at any given location and time. (1 point) Weather Precipitation Climate

asked by vensu on October 5, 2010
42. ### Chem

Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100

asked by Jason on November 7, 2010
43. ### mole fraction

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 241 torr. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of

asked by Kyle on January 30, 2010
44. ### Chemistry

If 3.21 mol of a gas occupies 56.2L at 44C and a pressure of 793 torr, what volume will 5.29 mol of this gas occupy under the same conditions? (A) 61.7 L (B) 30.9 L (C) 14.7 L (D) 92.6 L (E) 478 L

asked by Anonymous on January 1, 2010
45. ### Physics

An empty rubber balloon has a mass of 0.012kg. the balloon is filled with helium at 0 degrees celcius, 1 atm pressure, and a density of 0.179 kg/m3. the filled balloon has a radius of 0.5 m. a)what is the magnitude of the buoyant force acting on the

asked by Taylor on March 4, 2010
46. ### university chemistry

The instruction booklet for your pressure cooker indicates that its highest setting is 11.4 psi. You know that standard atmospheric pressure is 14.7 psi, so the booklet must mean 11.4 psi above atmospheric pressure. At what temperature will your food cook

asked by elena on January 31, 2010
47. ### Chemistry

What is the only positive ion found in H2SO4(aq)? a. ammonium ion b. hydronium ion c. hydroxide ion d. sulfate ion The answer's b, but I don't understand why.

asked by danny123 on November 20, 2010
48. ### Calculus

If the volume of a cube is increasing at 24 in^3/min and the surface area of the cube is increasing at 12 in^2/min, what is the length of each edge of the cube? I know that dV/dt=24 and ds/ds=12. I also know that Volume=s^3 and Surface Area=6*s^2, but what

asked by Anna on December 7, 2010
49. ### physics!

tarzan tries to cross a river by swinging from one bank to the other on a vine that is 10.0 meters long. his speed at the bottom of the swimg is 8.0 meters/second. Tarzan does not know that the vine has a breaking strnght of 1000 newtons. what is the

asked by hannah! on January 24, 2010
50. ### chemistry

Write the formula of the conjugate base for acid H3PO4 and what is the name of the base Write the formula of the conjugate base for acid H3O+ and what is the name of the base ..........and how can i tell how to get it? i am lost

asked by michelle on June 10, 2010
51. ### Physics

A 0.075 kg ball in a kinetic sculpture moves at a constant speed along a motorized conveyor belt. The ball rises 1.32 m above the ground. A constant frictional force of 0.350 N acts in the direction opposite the conveyor belt's motion. What is the net work

asked by Brian on December 9, 2010

As Alex sat down in the carnival tent, the lights dimmed. A spotlight revealed a short, heavy man holding a thick chain. He tugged the chain, and an old, muzzled bear appeared. The man, the animal's owner, announced that the bear's name was Sally. He said

asked by jae on August 30, 2010
53. ### Physics

An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 40.0 m/s at a height of 100 m above the ground. a) How far horizontally from the dropping point does the package strike

asked by Catherine on November 1, 2010

why is a stick of gum like a sneeze?

asked by maman on October 24, 2010
55. ### math

what do you call a duck that steals

asked by melissa on January 12, 2010
56. ### Physics

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 3.8 m/s?

asked by John on October 14, 2010
57. ### pH

Determine the pH of each of the following solutions. 0.21 M KCHO2 0.19 M CH3NH3I 0.19 M KI I'm not sure how i should set up the ice chart, and what Ka I should be using for the solutions

asked by Kyle on March 24, 2010
58. ### math

how many ways can you make 75 cents with quarters, dimes, and nickels

asked by crystal on June 9, 2010
59. ### Physics

A dentist's drill starts from rest. After 3.20 s of constant angular acceleration it turns at a rate of 2.7 104 rev/min. (a) Find the drill's angular acceleration. (b) Determine the angle (in radians) through which the drill rotates during this period.

asked by Sam on November 4, 2010
60. ### physics

The two angled ropes used to support the crate in the figure below an withstand a maximum tension of 1300 N before they break. The left angle is 30dregres, and the right angle is 45degrees. What is the largest mass the ropes can support? m=?

asked by andrea on September 20, 2010
61. ### Chemistry

Hello, I have a question that reads: Using the average molarity of your initial acetic acid solutions, the initial volumes, and the volume of NaOH added to reach the equivalence point, calculate the [C2H3O2-] concentration at the equivalence point. You

asked by Jens on May 9, 2010
62. ### chemistry

20) The ideal value of i (van't Hoff factor) for (NH4)3PO4. A) 2 B) 5 C) 4 D) 3 E) 1 I know the answer but how are problems like this figured out?

asked by Jessie on September 26, 2010
63. ### CHEM

is breaking an egg a chemical or physical change? is cooking an egg a chemical or physical change?

asked by Elizabeth on October 17, 2010
64. ### statistics

An IRS auditor randomly selects 3 tax returns from 58 returns of which 8 contain errors. What is the probability that she selects none of those containing errors?

asked by Kerri on September 19, 2010
65. ### physics

a 2000 kg car rounds a circular turn of radius 20.0 meters. if the road is flat and the coefficient of static friction between the tires and the road is .70, how fast can the car go without skidding

asked by mallory!!!!!!!!!!!! on January 24, 2010
66. ### chemistry

Nitrosyl bromide decomposes according to the following equation. 2NOBr (g)(equilibrium arrow) 2NO (g) + Br2 (g) A sample of NOBr (0.64 mol) was placed in a 1.00-L flask containing no NO or Br2. At equilibrium the flask contained 0.46 mol of NOBr. How many

asked by jessie on November 19, 2010
67. ### Chemistry

175g of water was heated fro 15 to 88 degrees C. how many kilocalories were absorbed by the water? I got 94.5 kcal. Is this right?

asked by Jason on September 18, 2010
68. ### chemistry

While in Europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 39.0 mi/gal? Assume that 1euro= 1.26; dollars.

asked by Mely on September 4, 2010
69. ### Math Pizzaz worksheet 9.3

What happens when the King of Beasts runs in front of a train? I cant figure out the riddle. I need help! :)

asked by Mintsey on October 27, 2010
70. ### Physics

3. A person exerts a force of 55 N on the end of a door 74 cm wide. What is the magnitude of the torque if the force is exerted a)perpendicular to the door b)at a 45 degree angle to the door, c) at a 125 degree angle to the door?

asked by Bobby on November 4, 2010
71. ### Math

Why did King Kong eat a truck?

asked by Di on April 20, 2010
72. ### science

NH2-, NH3, and NH4+ have H-N-H bond angles of 105, 107 and 109. Explain this variation in bond angles.

asked by Joseph on August 10, 2010
73. ### Chemistry

Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012% Pb by mass. How much of the water in milliliters contains 145 mg of Pb? (Assume that the density of the solution is 1.0g/mL.)

asked by Kelsey G on November 30, 2010

what is the answer to what do you call drilling 4,876 holes?

asked by Anonymous on March 20, 2010

guess rule with letters. Fit the rule AEFHIKLN Do Not fit BCDGJOP HOW TO FIND THE RULE?

asked by rosa on January 27, 2010
76. ### math cal

A plane flying horizontally at an altitude of 3 mi and a speed of 480 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 6 mi away from the station. (Round to the nearest

asked by anna on November 17, 2010
77. ### math

What does a boy who likes to play with switches do

asked by Anonymous on November 30, 2010
78. ### Chemistry

Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral? Al(ClO4)3-Acid LiCl-Neutral KClO2-BAse C6H5NH3NO2-Acid CH3NH3Br-Acid KCl-Neutral NaClO-Base NH4ClO-Acid Fe(ClO4)3-Acid C2H5NH3NO3-Acid Is this right?

asked by Anonymous on October 23, 2010
79. ### Physics

A sprinter explodes out of the starting block with an acceleration of +2.3 m/s^2, which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity (a) at t=1.2 s ans (b) at the end of the race?

asked by Heather on August 29, 2010
80. ### College Chemistry

Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 215 mg/L. I calculated the molarity as 1.58*10^-3 and the Ka as 1.58*10^-10. I did ICE and i got the pH as 6.3, but it was

asked by Kyle on March 23, 2010
81. ### writing process

Choose one of the following topics. Write an 8-paragraph sentence paragraph that fully develops the topic. a. following instructions is very important. b. Advances in technology are making people less social. c. A high school diploma is important to my

asked by jackie rios on November 30, 2010
82. ### Physics

A spring-loaded toy gun is used to shoot a ball of mass m=1.5 kg straight up in the air. The spring has spring constant k=667 N/m. If the spring is compressed a distance of 25.0 centimeters from its equilibrium position and then released, the ball reaches

asked by Eden on October 17, 2010
83. ### Physics

Question: The amount of internal energy needed to raise the temperature of .25 kg of water by 0.2 degrees Celsius is 209.3 J. How fast must a 0.25 kg baseball travel in order for its kinetic energy to equal this internal energy? KE = (.5)(m)(v^2) 209.3 J =

asked by mike on February 15, 2010
84. ### physics

a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the springs relaxation length.The block then travels over a horizontal floor with coefficient of kinetic friction 0.25. The friction

asked by help on November 23, 2010
85. ### chemistry

When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level rises. Based on this information, what can be said about these two solutions? a.) The unknown solution had the lower

asked by david on February 24, 2010
86. ### chemistry

Which of the following has the greatest buffer capacity? There are three separate problems below. 1. 0.40 M CH3COONa / 0.20 M CH3COOH 2. 0.40 M CH3COONa / 0.60 M CH3COOH 3. 0.30 M CH3COONa / 0.60 M CH3COOH Thanks!

asked by George on July 17, 2010
87. ### college chemistry

How many total moles of ions are released when the following sample dissolves completely in water: 5.15x10^-3 g Ca(NO3)2

asked by KELLY on September 26, 2010
88. ### Chemistry

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

asked by Pat on October 30, 2010
89. ### AP Chemistry

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

asked by Anonymous on November 14, 2010
90. ### Chem answer check/ help

For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.

asked by Jacob on February 22, 2010
91. ### Chemistry

Calculate Delta H for 4NH3 + 5O2 --> 4NO + 6H2O using: N2 +O2 --> 2NO DH= -180.5 kJ N2 + 3H2 --> 2NH3 DH= -91.8 kJ 2H2 + O2 --> 2H2O DH= -483.6 kJ

asked by Taylor on June 30, 2010
92. ### chem class

which of the following has the highest boiling point? a)C2Cl6 b)C2Br6 c)C2H6 d)C2F6 e)C2I6 i know its e, but why is that the answer? are all questions about boiling points similar? or they they have to do with intermolecular forces? i have a test soon on

asked by RiChy on September 16, 2010
93. ### chemistry HELP!

Solve an equilibrium problem (using an ICE table) to calculate the pH of each solution: a solution that is 0.170 M in HC2H3O2 and 0.105 M in KC2H3O2

asked by Lisa on December 15, 2010
94. ### General Chemistry

A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution?

asked by Dave on October 12, 2010

The difference between the two acute angles of a right- angled triangle is 2 π/5 radians. Express the angles in degrees. I’ve multipled 2 π/5 * 180/ π and got the result 72 degree But the answer is 81 degree and 9 degree. Please explain me!!!

asked by Akash on May 12, 2010
96. ### Chemistry- college

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta

asked by Willy on November 1, 2010

An ice cube that is 3 cm on each side is melting at a rate of 2 cm cubed per minute. how fast is the length of the side decreasing?

asked by Joel on October 21, 2010
98. ### chemistry

Radio waves travel at the speed of light which is 3.00 x 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 x 108 km from Earth?

asked by ashley on September 12, 2010
99. ### physics

The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you are approximately 1.8 m tall and that the nerve impulse

asked by jer on September 14, 2010
100. ### Chemistry

the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please show all steps USING THE ARRHENIUS EQUATION. Here is my work so far: K = A

asked by Jim on October 26, 2010