Tuesday
February 9, 2016

# Posts by Brittany

Total # Posts: 903

Intermediate Algebra
Thank you so much, I couldn't figure out what to multiply both sides with. Again this is an awesome website.
September 21, 2013

Math
a pharmacist found at the end of the day she had 7/4 as many prescriptions for antibiotics as tranquilizers. She had 66 prescriptions altogether. How many did she have for tranquilizers?
September 5, 2013

AP Physics
You can obtain a rough estimate of the size of a molecule by the following simple experiment. Let a droplet of oil spread out on a smooth water surface. The resulting oil slick will be approximately one molecule thick. Given an oil droplet of mass 10.00 multiplied by 10-7 kg ...
September 4, 2013

math
9x^4-x^2=0 step by step
September 2, 2013

math
Titus deposited $1,508.49 in a savings account that earns 4.2% simple interest. What will Titus's account balance be in 8 months? August 29, 2013 English If someone speaks candidly, she is most likely speaking ; ~honestly ~quietly ~sarcastically August 28, 2013 English Which of the following was not a popular genre during the Victorian era; detective fiction, gothic fiction or postmodern fiction? August 28, 2013 composition 1 How do I start a good readers response? August 26, 2013 calculus how would you solve a problem like this for X: (1/3=(3^2x+2) August 18, 2013 Chemistry In the following reaction, how many grams of ferrous sulfide will produce 0.56 grams of iron oxide? 4FeS+7O2->2Fe2O3+4SO2 The molar mass of ferrous sulfide is 87.92 grams and that of iron oxide is 159.7 June 26, 2013 Physics An object whose mass is unknown is held by two rigid rods. The whole system is at rest. The angle between the vertical direction and the left rod from point A to B is 60 degrees. The angle between the vertical direction and the right rod from point C to D is 30 degrees. The ... June 24, 2013 PHYSICS Two cars lost in a blinding snowstorm are traveling across a large field, each thinking they are on the road, as shown in the figure on the left. They collide. If the distance x is 150 meters and the red car is travelling at 19.1 mph, how fast to the nearest hundredth of a mph... June 6, 2013 Physics A pinhole camera has a small circular aperture of diameter D. Light from distant objects passes through the aperture into an otherwise dark box, falling on a screen at the other end of the box. The aperture in a pinhole camera has diameter D = 0.600 mm. Two point sources of ... June 2, 2013 Algebra 2 The functions f(θ) and g(θ) are sine functions, where f(0) = g(0) = 0. The amplitude of f(θ) is twice the amplitude of g(θ). The period of f(θ) is one-half the period of g(θ). If g(θ) has a period of 2pi and f (pi/4) = 4, write the function ... May 24, 2013 Algebra Square root 18 + (3/square root 2) May 8, 2013 Algebra Square root 18 + 3/square root 2 May 7, 2013 Math Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after ... May 2, 2013 algebra 1 *I have asked countless people to help me with this story problem and nobody seems to know how to do it! Please help! Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C ... May 2, 2013 algebra 1 Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after 37... May 1, 2013 Math Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after 37... May 1, 2013 Math For a seesaw that 14 ft long, where should the fulcrum be placed to balance a 204 lbs adult and a 81.6 lbs child? April 24, 2013 math A 4inch-thick concrete slab is being poured for a circular patio 14 feet in diameter. Concrete costs$55 per cubic yard. Find the cost of the concrete, to the nearest cent.
April 11, 2013

English
An international agreement that aims to reduce carbon dioxide emissions and the presence of greenhouse gases. Countries that ratify the Kyoto Protocol are assigned maximum carbon emission levels and can participate in carbon credit trading. Emitting more than the assigned ...
April 8, 2013

Algebra
Matt ate a total of 100 raisins over a five day period. Each day he ate six more raisins than the previous day. How many did he eat the first day?
March 30, 2013

Algebra
Three ships leave New York for France on the same day. The round trip takes the first ship 12 days, the second ship 16 days and the third ship 20 days. How many days will elapse before all three ships again leave New York on the same day? Assume continuous trip activities for ...
March 29, 2013

statistics
The average homicide rate for the cities and towns in a state is 10 per 100,000 population with a standard deviation of 2. If the variable is normally distributed, what is the probability that a randomly selected town will have a homicide rate greater than 14?
March 24, 2013

Physical science
Help Please . Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate? A.increasing water temperature B.decreasing water temperature C.using more water
March 22, 2013

physical science
A. increasing water temperature B decreasing water temperature C.using more water
March 22, 2013

physical science
Help please. Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate?
March 22, 2013

chemistry
a 225.0 g sample of an unknown, silver, pure metal was heated to 95.5 degrees celsius then put into 150.50 g of water at 22.5 degrees celsius. the water was heated by the hot metal to a temperature of 31.4 degrees celsius. what is the specific heat? what is the metal?
March 18, 2013

chemistry
thank you , but what do I substitute the specific heat metal for to find out what it is?
March 15, 2013

chemistry
a 225.0g sample of an unknown, silver, pure metal was heated to 95.5 degrees Celsius and then put into 150.50g of water at 22.5 degree Celsius. the water was heated by the hot metal to a temp. of 31.4 degree Celsius. what is the specific heat of the metal and what is the metal?
March 15, 2013

chemistry
what mass of a sample of gold requires 1.75 kJ to change its temperature from 28.2 degrees Celsius to 89.5 degrees Celsius?
March 15, 2013

math
in a triangle, the measure of the first angle is twice the measure of the second.the measure of a third triangle is 64 degrees more than athe measure of the second angle. Use the facts that the sum of the measures of the three angles of a triangle is 180 degrees to find the ...
March 13, 2013

Math
What is the value of x x/60 = 1/2/1/6
March 11, 2013

Math
An architect is drawing a scale model of a new mall. The real mall will be 1800 feet long. The scale the architect is using is 1 inch is equal to 100 feet. How long will the model be?
March 11, 2013

Math
A ladder has a shadow 3.5 meters long. Marlowe’s shadow is .75 meters long. If Marlowe is 1.5 meters tall, how tall is the ladder?
March 11, 2013

Math
A pole has a shadow that is 5 feet long. Jackie's shadow is 3 feet long, and she is 6 feet tall. How tall is the pole?
March 11, 2013

Math
A pole has a shadow that is 5 feet long. Jackie's shadow is 3 feet long, and she is 6 feet tall. How tall is the ladder?
March 11, 2013

Chemistry
How much heat (kcal)is needed to melt 14 ice cubes? Each cube is at 0c and has a mass of 28grams.
March 4, 2013

trig
10sinB+5 = sinB+5
March 1, 2013

chemistry
At 0*C a 1.0-L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2, and 5.0 x 10^21 molecules of NH3. What is the partial pressure of each gas, and what is the total pressure in the flask?
March 1, 2013

Physics
a 0.67 kg rubber ball has a speed of 2.2 m/s at point a and kinetic energy 7.1 J at point B find the total work done on the ball as it moves from a to b
February 27, 2013

Physics
a 0.67 kg rubber ball has a speed of 2.2 m/s at point a and kinetic energy 7.1 J at point B find the total work done on the ball as it moves from a to b
February 27, 2013

Physics
A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
February 26, 2013

Physics
A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
February 26, 2013

math
A marathon runner ran the first 5 mi. in 32.5 min. If she continues running at this pace, how long will it take her to run the entire marathon of 26.2 mi?
February 21, 2013

math
A factory produces bicycles 6 motorcycles in 9 hours. Write a proportion and solve it to find how many hours it takes to produce 16 motorcycles
February 19, 2013

Math
A basketball star earned \$2,000,000 last year. He played in 64 games for an average of 42 minutes per game. Find these rates dollars per game dollars per minute of playing time
February 14, 2013

Math
Mr. quark drove his car 314 miles in 6.5 hours. He used 12.7 gallons of gas. Find these rates. gallons per mile
February 14, 2013

Math
Mr. quark drove his car 314 miles in 6.5 hours. He used 12.7 gallons of gas. Find these rates
February 14, 2013

Statistics
If student A scored 42 on a test of reading and the test had a mean of 52 and a standard deviation of 8, what percentage of test respondents scored below student A?
February 13, 2013

Biostats
If the average (xbar) on an assignment in a class was 82% with a standard deviation (s) of 4.8, what is the z-score for someone scoring 75% (round to the one hundredths place or two decimal places)?
February 3, 2013

Physics
If a 60 kg meteor falls to earth from a great distance. How much gravitational potential energy does it lose? (the energy PE is 0 at a great distance). What happens to this potential energy? Final-Initial=-Gmm/r-0=change in energy
January 31, 2013

Chemistry.
Thank you so much! The 151 was the wavelength notation.
January 29, 2013

Chemistry.
An X-ray beam with = 151 incident on the surface of a crystal produced a maximum reflection at an angle of = 28.2. Part A Assuming , calculate the separation between layers of atoms in the crystal. Confused on which formula to use to find this answer.
January 29, 2013

Chemistry
Four ice cubes at exactly 0 ^\circ {\rm{C}} having a total mass of 55.0g are combined with 110g of water at 77^\circ C in an insulated container. Part A If no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 22, 2013

PRE-ALGEBRA
January 18, 2013

intergrated topics/math
i need help i dont get this problem......
December 20, 2012

intergrated topics/math
solve for x: 4x(5-6)=10(6x+2)
December 20, 2012

chemistry
C4H8CLO2 PREDICT THE IR ABSORBANCIES PROTON NMR AND 13C NMR SPECTRAL CHARACTERISTICS FOR THE FOLLOWING MOLECULE. DRAW THE EXPECTED SPECTRA. ALSO PREDICT THE MASS SPECTRUM SHOWING THE MOLECULAR ION AND ANY SIGNIFICANT HIGHER M/Z PEAKS.
December 18, 2012

Grammar
Identify the abbreviations in this sentence. When they raise me to a high position, then ill get a raise.
December 5, 2012

Physics
A 50kg box is sitting on your front porch. The coefficient of sliding friction between the box and floor is .4. You are trying to push the box from the porch into the house. What is the force required to push the box at a constant speed?
December 3, 2012

math
Is the expression a monomial? explain. qs + 5
November 26, 2012

Physics
An object is placed 8 cm in front of a convex lens of focal length 6 cm. Find the image location by drawing a ray tracing diagram to scale. Verify your answer using the lens equation.
November 23, 2012

precalccc
find all the real zeros and multiplicity of f(x)=x^4-68x^2+256
November 19, 2012

thank you so much ms sue. I was able to take the questions we differed on look through the reading material to really get a grasp on the concepts. I was able to resubmit the test (not counted toward grade) just to see if my understanding had improved. i only got 2 wrong that ...
November 17, 2012

1c 6a 11b 16a 2a 7c 12c 17d 3d 8b 13c 18c 4d 9b 14d 19c 5a 10d 15b 20b These answers got me a 65.. thought i had a firm grasp on the concepts in the chapters... now i want to go back and read over the incorrect questions to get a better understanding
November 17, 2012

i got a 65, on it. i can post my answers also. i was having a hard time figuring out which questions i got wrong.
November 17, 2012

Algebra/Math
A total of 504 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?
November 14, 2012

Sociology
November 11, 2012

Chemistry
51.34 g of water at 81.5 oC is added to a calorimeter that contains 52.13 g of water at 40.7 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.
November 8, 2012

Chemistry
Pentane is a small liquid hydrocarbon, between propane and gasoline in size C5H12. The density of pentane is 0.626g/ml and its enthalpy of combustion is ΔHcomb =-3535kj/mol. Estimate the fuel valve and the fuel density of pentane.
November 8, 2012

Chemistry
Calculate the final temperature of a mixture of 200.0g of ice initially at -16.5 Celsius and 406.0g of water initially at 84.5 degrees Celsius.
November 8, 2012

Chemistry
The flame in a torch used to cut metal is produced by burning acetylene(C2H2) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251kj of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 36.658 x 10^4 kj of heat?
November 8, 2012

Chemistry
Which of the following gases will effuse through a hole in a balloon fastest? a.Kr b.NO c.N2O d.NO2 e.ArNO2
November 6, 2012

Chemistry
What is the root-mean-square speed of N2O at 25°C?
November 6, 2012

Chemistry
The density of an unknown gas is 1.72 g/L at 750.0 torr and 30.0°C. Which of the following could be the unknown gas? a. CS2 b. NO c. N2O d. NH3 e. N02
November 6, 2012

Chemistry
Which of the following reactions will result in a reduced total pressure? a. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) c. 2HI(g) → H2(g) + I2(g) b. 2N2O(g) → 2N2(g) + O2(g) d. 2H2(g) + O2(g) → 2H2O()
November 6, 2012

Chemistry
How many moles of propane are contained in a 5.00 L tank at 450 torr and 25°C?
November 6, 2012

Chemistry
In an experiment, 25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0°C. The balloon is then cooled to 5.0°C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
November 6, 2012

Chemistry
Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3 + 3 CO --> 2 Fe + 3 CO2 If you begin the reaction with 84.34 g of iron(III) oxide and 68.87 g of CO, which reactant will be in excess at the end of the reaction and how ...
November 5, 2012

Chemistry
Which one of these samples contains the smallest number of molecules? a. 1.0 L of H2 at STP (0°C and 1atm) d. 1.0 L of N2 at 0°C and 800 torr b. 1.0 L of N2 at STP e. 1.0 L of He at STP c. 1.0 L of H2 at 20°C and 760 torr
November 4, 2012

Chemistry
Methanol (CH4O) is converted to bromomethane (CH3Br) as follows: CH4O + HBr --> CH3Br + H2O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percent yield?
November 4, 2012

Childhood Education
How does poverty relate to a child's risk for inadequate health and well-being?
November 1, 2012

Childhood Education
What items would you first look for to determine whether lead is present in the environment where children are present?
November 1, 2012

Childhood Education
Can anyone answer this question? Compare the environment for toddlers with one suitable for infants. How are the areas similar? How are they different?
October 31, 2012

Childhood Education
Compare the environment for toddlers with one suitable for infants. How are the areas similar? How are they different?
October 31, 2012

Childhood Education
Compare the environment for toddlers with one suitable for infants. How are the areas similar? How are they different?
October 31, 2012

Organic Chemistry
An expanded structural formula shows all the atoms of the molecule and all the bonds between the atoms in the molecule. Draw the expanded structural formula for 1,3-dichlorocyclopentane. Draw the structure by placing atoms on the grid and connecting them with bonds. Include ...
October 30, 2012

english-dr.faustus
October 22, 2012

english-dr.faustus
the warning Dr.Faustus teaches is? A-the devil is evil B-do not wish for more than heavenly power permits C-the end will justify the means D-both A and C
October 22, 2012

math
the product of a 1 digit number and a 2-digit number number is 284 what is the awnser
October 20, 2012

Pre-Algerbra
In which quadrant does the point lie? Write the coordinates of the point. Point B A. quadrant II; (–2, –4) B. quadrant III; (2, 4) C. quadrant III; (–2, –4) D. quadrant IV; (–4, –2)
October 17, 2012

Chemistry/Quantitive Anaylsis
Determine the absolute and percent relative uncertainty expressing the result in the correct number of significant digits a.) 6.2 (+-0.2)-4.1(+-0.1) b.)[9.23(+-0.03)][4.21(+-0.20}/21.1(+-0.2) c.)log[3.1415(+-0.001)] d) log[(0.104(+-0.0060)]^1/2 /0.0511(+-0.00090]
October 14, 2012

Chemistry/Quantitive Anaylsis
Before determining the amount of sodium carbonate in a sample by titration with standard hydrochloric avid the anaylst decide to check the procedure by analyzing a known sample of 98.75 (w/w)% purity. Five replicate determinations of the known gave the following results: 98.71...
October 14, 2012

Chemistry
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.30 pounds of methane (fuel value is 11.97 kcal/g) is used to heat 122.0 kg of water at an initial temperature of 21.1 °C...
October 11, 2012

college stats
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate statistic? What is the...
October 8, 2012

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