Friday

April 29, 2016
Number of results: 116,622

**chemistry**

If 15.0 grams of C3H6, 10.0 grams of oxygen, and 5.00 grams of NH3 are reacted, what mass of acrylonitrile can be produced assuming 100% yield, what mass of the excess reactants remain? 15g C3H6 (1 mol / 42.08 g) = .35 mol C3H6 .36 mol C3H6 ( 2 mol C3H3N / 2 mol C3H6) = .36 ...
*February 5, 2015 by loulou*

**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 = (.5)(.25kg)(v^2) ...
*February 15, 2010 by mike*

**Math 209**

solve, 3x^2 + 6x - 105
*October 30, 2009 by Jean*

**Math 209**

f(x) = x3 + 2x2 0.4X 1 how do you you factor this?
*June 8, 2010 by Anonymous*

**Math 209**

f(x) = x3 + 2x2 0.4X 1 how do you you factor this?
*June 8, 2010 by Anonymous*

**math 209**

.78=2(3.14)*sqrt.5/g solve for g
*February 5, 2013 by shannon*

**college math 209**

solve for y, 5y^-13y=6
*January 16, 2011 by Anonymous*

**college math 209**

find the values for x and y 4x - 9= -15 -3x - 4y = 22
*January 23, 2011 by Anonymous*

**Math 209-College Mathematics II**

How do you factor this completely: x^3 + ax + 3a + 3x^2
*May 29, 2010 by Sheryl*

**college math 209**

solve for u, where u is a real number u - 18 = 2
*January 15, 2011 by Anonymous*

**college math 209**

solve the equation (x+4)^2=2x^+19x+46
*January 16, 2011 by Anonymous*

**college math 209**

simplify the following expression -(x) + 4 (4 v + 2x)
*January 23, 2011 by Anonymous*

**math**

solve the system 7x^2 - 5y^2 + 20y = 3 21x^2 + 5y^2 =209
*March 10, 2012 by Martin*

**math 209**

find the value of annuity for a 1=$3000, I=0.09, n= 25
*January 15, 2013 by james*

**math**

If the sum of n terms of the series 4+7+10+... is 209, find n
*April 16, 2016 by Ayomide*

**math**

2 forms of writing this number. 3,209,003,812?
*September 15, 2009 by nora*

**Math/209**

How do I find the set of all points of y=-8 on a graph?
*June 13, 2010 by Sam*

**math**

how do you write 3,209,003,812 in standard form
*September 1, 2010 by kathy*

**college math 209**

use the quadratic formula to solve for x, 3x^2 + x -8=0
*January 16, 2011 by Anonymous*

**math**

Round 209,999.598 to the nearest hundredths
*February 2, 2014 by gio*

**information literacy**

Which of the following sets of call numbers is in the correct order? A. CR 209 .D97 1991 CA203 .P39 1992 CL207 .K256 1976 C201 .G37 1910 B. CA203 .P39 1992 CL207 .K256 1976 CR 209 .D97 1991 C201 .G37 1910 C. C201 .G37 1910 CR 209 .D97 1991 CL207 .K256 1976 CA203 .P39 1992 D. ...
*January 15, 2012 by tasha*

**5th Grade Math**

How do you write 6,549,920 and 945,209? Thanks
*October 23, 2008 by Mom*

**college math 209**

simplify as much as possible y^248yv^2 - v12 y^5
*January 23, 2011 by Anonymous*

**Further math**

If the sum of the first n terms of the series 4 + 7 + 10 + ... is 209, find n.
*April 16, 2016 by Ayomide*

**college math 209**

write in simplified radical form by rationalizing the denominator 25 + 3/5 - 1
*January 15, 2011 by Anonymous*

**college math 209**

solve for y, 5y^2-13y=6 I did forget the exponent the first time..
*January 16, 2011 by Anonymous*

**math 209**

which of the following conclusions is true about the statement below? x^2= square root x
*February 11, 2014 by jim*

**algebra math 209**

evaluating polynomials negative 12sq times 3s -12sq *3s
*August 17, 2010 by Anita fields*

**college math 209**

simplify as much as possible y^2sqrt 48yv^2 - vsqrt 12 y^5
*January 23, 2011 by Anonymous*

**Mth/209**

x/3 = 4/ x + 1
*July 5, 2010 by Gail*

**Physical Science**

1. Which equation correctly shows beta decay? (A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y (B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y (C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y (D) 210/82 Pb -> 210/83 Bi + y (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y 2. The half-life if radon...
*November 18, 2013 by CJ*

**electricity and electronics**

a transformer has a primany voltage of 115 v and secondary voltage of 24 v if the number of tures in the primany is 345 how many turns are in the secondary The voltage ratio Vsecondary/Vprimary = 24/115 = 0.209 This equals the turns ratio Nsecondary/Nprimary = Nsecondary/345...
*August 10, 2005 by annette*

**Math**

155,168,170,193,198,209,229,270,324,347 1.median 2.maximum 3.minimum 4.mean 5.mode 6.range
*September 20, 2011 by Frances*

**college 209**

multiply (27-53)(87-53)
*January 16, 2011 by Anonymous*

**Chemistry**

What NaCl concentration results when 209 mL of an 0.660 M NaCl solution is mixed with 492 mL of a 0.270 M NaCl solution? __ mol/.209 L = 0.660 M __ mol/.492 L = 0.270 M .. I have no idea how to solve this. I have no idea why I even set up the equation above when it's asking me...
*April 9, 2012 by Katherine*

**Math 209**

THE FEDERAL DEBT D IN TRILLIONS OF DOLLARS HELD BY FOREIGN AND INTERNATIONAL INVESTORS x YEARS AFTER 1970 CAN BE MODELED BY D(x) = WHERE 15 ≤x≤ 40.
*February 24, 2013 by Mari*

**algebra math 209**

swimming space. The length of a rectangular swimmung pool is 2x-1 meters, and the width is x+2 meters. write a polynomial A(x) that represent the area. Find A(10)
*August 17, 2010 by Anita fields*

**math 209**

the time t for a pendulum to swing back and forth once is called its period and is given by t=2pi*sqrt l/g where l equals the length of the pendulum solve for g
*February 5, 2013 by shannon*

**Finance**

Your hospital has been approached by a major health maintenance organization (HMO) to perform all their diagnosis related group (DRG) 209 cases (major joint reattachment procedures). They have offered a flat price of $10,000 per case. You have reviewed your charges for DRG 209...
*June 24, 2011 by Karam*

**math 209**

machine produces 192 bolts in 20 minutes. At the same rate, how many bolts would be produced in 50 minutes? thank you
*October 13, 2010 by anna*

**math**

GCD (24,20) IS 4. sINCE gcd(4,12 ) is 4 then GCD (24,2012 IS 4 USE Euclidem LGERITHM TO FIND THE gcd 722, 2413,209
*November 18, 2014 by ELLA*

**Math 209**

The width of a rectangular carpet is 7 meters shorter than the length, and the diagonal is 1 meter longer than the length. What are the carpet's dimensions?
*August 3, 2011 by Wanda*

**math 209**

Swimming space. The length of a rectangular swimming pool is 2x 1 meters, and the width is x 2 meters. Write a polynomial A(x) that represents the area. Find A(5).
*June 22, 2009 by jericia*

**math 156**

Stock in a company is selling for $11 3/4 per share. if some one purchases $893 worth stock in this company, how many shares did they get? is it 209
*December 9, 2009 by Rmz*

**Math 209**

If C dollars are deposited in an account paying r percent annual interest, approximate the amount in the account after x years if C=$150, r= 1.9% and x=25 years
*August 15, 2011 by Wanda*

**algebra 209**

write the following in simplified radical form 3 sqrt 250
*January 16, 2011 by Anonymous*

**Math**

Given: ________, 243, 226, 209, 192, 175, The 67th term of the sequence is __________. The series of the first 27 terms of the sequence is __________.
*June 18, 2014 by Jade*

**math!**

GCD (24,20)IS 4. sINCE gcd (4,12) IS 4, THEN gcd (24,20,12) is 4. use this approach and the euclidean algorithim to find the GCD ( 722, 2413,209) WHAT IS THE gcd?
*November 19, 2014 by BECKY!*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. calculate its Ksp.
*November 29, 2010 by Al*

**PLG 209**

Summarize the Bill of Rights (and Amendments 13-15). Discuss why they apply to criminal law
*March 22, 2014 by Anonymous*

**basic math **

Identify the rate, base, and amount in the following applications. Do not solve the applications at this point. 22% of Shirleys monthly salary is deducted for withholding. If those deductions total $209, what is her salary?
*April 7, 2010 by tea*

**biology**

How can an understanding of the "mortality factor" lead to a successful biological control of pests in agriculture & horticulture? Check these sites. http://72.14.209.104/search?q=cache:taS99s4LDW0J:cals.arizona.edu/crop/cotton/insects/wf/horticultura0204.html+mortality+factor...
*February 7, 2007 by Ryan*

**Math**

Can someone explain this problem to me, I cannot figure out how they came up with the answer. The example in my book does not work with this problem. Find the minor for the element in the 1strow and 2ndcolumn. -3 2 -1 19 13 -18 -19 12 7 correct answer is: -209 The numbers I ...
*April 26, 2008 by Sara*

**mth 209**

what formula do i use to figure our the usage (in million)of the drug claritin. From the year 2008-2011
*January 4, 2012 by Victor *

**Pre-Calculus**

A local salesman receives a base salary of 675 monthly. He Also receives a commission of 11% on all sales over 1900. How Much would he have to sell in a month if he needed to have a monthly income of 3000? My Work: 1900*.11=209 3000-675=2325 2325/209=11.12440191 1900*11....
*August 14, 2015 by Lost*

**math 209**

The perimeter of a rectangle is 44ft the length is 4ft longer than the width. Find the demensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.
*July 17, 2011 by chris*

**mummification**

what was the substance used to stuff nostrils? The ancient Egyptians stuffed the nostrils with resin or wax. http://209.85.165.104/search?q=cache:3ghP1ChFOJYJ:www.touregypt.net/featurestories/mummification.htm+mummification+nostrils+resin&hl=en&gl=us&ct=clnk&cd=1&ie=UTF-8
*January 23, 2007 by ruby*

**chemistry**

Calculate Ke for the following(equilibrium concentrations given below substances) NH4SH(g) yields NH3(g) + H2S(g) + heat [.027] [.0234] [.209] Thank you!
*January 18, 2010 by mary*

**chemistry**

bismuth of 209/83Bi is stable because? nuclei even or odd # of nucleons. which one is stable?
*May 12, 2008 by mike*

**unit rates**

Problem 1. 209 km. in 5 hours Problem 2. A soccer player scored 41 goals in 84 games
*March 12, 2009 by Shelby*

**Math 209**

If a cylindrical container has a volume of cubic feet, then its surface area S in square feet (excluding the top and bottom) is given by S = s=(2π )/r where r is the radius of the cylinder. (a) Calculate S when r =1/2 foot (b) What happens to this surface area when r ...
*July 9, 2011 by DeLynn Stewart*

**Algebra**

Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth. y=-2+7x 10x-7y=209
*March 25, 2012 by Katy*

**chemistry**

how many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
*January 31, 2008 by Theodore*

**Algebra 209**

the perimeter of rectangle back yard is 6x+6 yards if the width is x yards find a binominal that represents the length.
*January 24, 2010 by Tanya*

**chemistry**

how many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
*March 29, 2012 by help please*

**Chemistry**

How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7gFe? Fe2O3(s) + 3CO(g) => 3CO2(g) + 2Fe(s)
*May 17, 2012 by Shelly*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it
*November 30, 2010 by Joe*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it
*November 30, 2010 by Joe*

**math/209**

Mike would like to enlarge his rectangular front yard which is currently 80 feet by 40 feet. He can only extend the width and length by 5x feet. If x = 7 feet, what will be the increase in area of the front yard? How can this problem be raised to a higher level of complexity
*October 27, 2010 by wilfredo*

**math 209**

Area of a sail. The area in square meters for a triangle is given by A(x)=x^2 +5x +6. a.) Find A(5) b) if the height of the sail is x+3 meters, then what is the length of the base of the sail when area is x^2 +5x+6m^2?
*June 22, 2009 by trina*

**Algebra**

Given ________, 243, 226, 209, 192, 175, a. What is the 67th term of the sequence b. What is the series of the first 27 terms of the sequence
*September 9, 2014 by Ruby*

**Math 209**

An advertisement for LED HDTVs lists the following prices for their different sizes (all have the same aspect ratio 9:16): 22-inch $ 247.99 42-inch $ 1,299.99 46-inch $ 1,449.99 52-inch $ 1,799.99 55-inch $ 1,999.0 Rearrange this list in terms of the price per viewable image ...
*June 8, 2010 by Anonymous*

**MATH 209**

Ace manufacturing has determined that the cost of labor for producing x transmissions is 0.3x2+400x+550 dollars, while the cost of materials is 0.1x2+50x+800 dollars. Find the total cost of producing x=500 transmissions.
*March 19, 2010 by Anonymous*

**Pre-Calc/Trig**

Complete the following for each system that involves one or more quadratic equations: Solve the system algebraically 7y^2-5x^2+20x=3 5x^2+21y^2=209
*January 8, 2015 by Anonymous*

**mathematics **

Given that log5 3=0.683 and log5 7=1.209.without using calculator,evaluate (a) log5 1.4 b)log7 75 c) log3 125
*April 16, 2014 by jessica*

**Physics**

What is the apparent weight of a 75 KG astronaut 4200 km from the center of the earth's moon in a space vehicle.a) moving at constant velocity, and b) accelerating toward the moon at 209 m/s? state the direction in eachcase
*March 3, 2010 by Vim*

**Chem**

A 0.1098 g sample of copper metal is dissolved in 34 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 209.5 mL. (Calculate the molarity of Cu2+.)
*November 2, 2011 by ALMA*

**history**

What events caused the National Security Council to suggest the U.S. triple its current defense budget? What time period are you talking about? This might give you some ideas http://209.85.165.104/search?q=cache:Z0jf6XqFj6AJ:intelligence.senate.gov/108161.pdf+National+Security...
*May 19, 2007 by Anonymous*

**Chemistry**

A 10.0g sample of H2O(l) at 23.0degrees C absorbs 209 joules of heat. What is the final temp of the H2O(l) sample?
*January 19, 2016 by Sabrina*

**algebra**

A small garden measures 14 ft by 6 ft. A uniform border around the garden increases the total area to 209 ft2. What is the width of the border?
*January 24, 2016 by mel*

**chemistry**

fill in the missing symnbols in the following nuclear bombardment reactions a. 96 4 100 42Mo + 2He = 43 Tc+ ? b. 59 1 56 27Co+ 0n = 25+ ? c. 23 23 1 11Na+ ? = 12Mg+ 0n d. 209 210 1 83Bi+ ? = 84Po+ 0n e. 238 16 1 92U + 8O= ? + 5 0n TEACHER DID NOT EXPLAIN THIS AT ALL SO CONFUSED
*December 15, 2010 by coleman*

**Science/Math**

Hello, Suppose that a newly discovered element called centium has three isotopes that occur in nature. These are centium-200, centium-203, and centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element?
*April 13, 2011 by Please help!*

**Math 209**

When simplifying a rational fraction, why do you need to factor the numerator and the denominator? If there is a common factor in both the numerator and denominator, that factor will cancel, thus simplifying the fraction. e.g. 15/18 = (3*5)/3*6) =(3/3)*(5/6) =(1)*5/6 =5/6
*April 3, 2007 by Jennifer*

**math 209**

A certain medicine is given in an amount proportional to a patient's body weight. Suppose a patient weighing 108 pounds requires 135 milligrams of medicine. What is the weight of a patient who requires 260 milligrams of medicine?
*October 13, 2010 by anna*

**college 209**

multiply (2 sqrt 7 -5 sqrt 3)(8 sqrt7-5 sqrt 3)
*January 16, 2011 by Anonymous*

**math 209**

Selling shirts. If a vendor charges p dollars each for rugby shirts, then he expects to sell 2000 100p shirts at a tournament. a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20). c) Use the bar graph...
*June 22, 2009 by jericia*

**Geometry **

I have to find the area of a triangle. The base is 22 The height is 11 square root 3... for this, it was 19.052... I rounded that to just 19. Was this okay??? I then get 418, divided by 2, and got 209 as the area. Was it accurate that I rounded that number?
*April 5, 2016 by SkatingDJ*

**chemistry**

In an acid base titration,25.0 ml of nitric acid, HNO3, were neautralized by 28.0 mL of 0.209 mol/L calcium hydroxide, Ca(OH)2. What is the concentration of the nitric acid?
*January 12, 2015 by Mindu*

**geometry**

If the area of a trapezoid is 209 square yards and the bases are 15 yards and 23 yards. What is the height of the trapezoid?
*November 28, 2011 by Angel*

**Math 209**

A particular rat given n trials in a maze can run through the maze in t minutes, where: t=6+_20__ n+2 How many trials are needed so that the rat can run through the maze in exactly eight minutes?
*August 7, 2011 by Wanda*

**chemistry**

The mole fraction of oxygen in air is 0.209. Assuming nitrogen is the only other constituent, what are the partial pressures (in torr) of oxygen and nitrogen when the barometer reads 780 torr?
*March 20, 2013 by alex*

**Math/209**

Dimensions of a Box A box is made from a rectangular piece of metal with length 50 inches and width 40 inches by cutting out square corners of length x and folding up the sides. (a) Write an expression that gives the surface area of the inside of the box. (b) If the surface ...
*March 12, 2013 by Shay*

**physics 209**

A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg⋅m2 and radius R = 10cm. There is friction in the pulley. The mass is dropped from rest, and after 2s it traveled 0.4m. What is the torque due to friction?
*November 19, 2012 by mike*

**geography**

wich city in the great lake area is busiest for shipping goods A lengthy Google search has produced two answers -- Port of Indiana and Duluth, Minnesota. Depending upon how you define "busiest for shipping goods," either answer may be correct. http://72.14.209.104/search?q=...
*January 24, 2007 by gladys*

**Geometry!**

The distance around the equator of Saturn is about 378,675 km. What is the equatorial diameter of Saturn? Use pi = 3.14. A) 241,209 B) 241,194 C) 120,584 D) 120,597 I think it is [D] but I'm not sure.
*April 15, 2012 by Joe*

**Math 209**

A particular rat given n trials in a maze can run through the maze in t minutes, where: t=6+20 n+2 How many trials are needed so that the rat can run through the maze in exactly eight minutes?
*August 11, 2011 by Wanda*

**Chemistry**

I am supposed to add up these numbers, using the significant digits rules. 150 76.9 209 .036 I got 435.936. Following the sig. digs. rules, it would be 435.9, right? How does this then equal 440 as my science books says? Thank you so much.
*February 19, 2009 by Brandon*

**Math**

an investor invested a total of $3,100 in two mutual funds. One fund earned a 8% profit where the other earned 5% profit. If the investor's total profit was $209, how much was invested in each mutual fund?
*January 30, 2013 by Ang*

**chemistry**

We have an aqueous solution that contains 47% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 209 g/mol. The density of the solution is observed to be 1.3 g/mL. What is the molarity of Z in this solution? Answer in units of mol/L
*September 13, 2012 by cheri*

**Physics**

Two particles are fixed to an x axis: particle 1 of charge q1 = 1.73 ¡Ñ 10-8 C at x = 30.0 cm and particle 2 of charge q2 = -4.41q1 at x = 78.0 cm. At what coordinate on the x axis is the electric field produced by the particles equal to zero?
*October 20, 2015 by Anonymous*