Wednesday
October 1, 2014

Posts by Brittany


Total # Posts: 832

Physical Science 8th grade
A balloon filled with air does not rise as a balloon filled with helium. What does this tell you about the density of helium? A. Helium is more dense than air B. Helium is less dense than air C. The two gases have the same density D. When heated, helium becomes more dense
September 8, 2014

statistics
The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, , from this year is greater than or equal to the mean IQ score of new hires, , from last year. This ...
August 3, 2014

math
The polynomial x 3 + 5x 2 -57x -189 expresses the volume, in cubic inches, of a shipping box, and the width is (x+3) in. If the width of the box is 15 in., what are the other two dimensions? ( Hint: The height is greater than the depth.)
June 9, 2014

Prevents
If a book would cost 36 dollars and it had 10 percent of discount how much would the book cost after the discount
May 28, 2014

math
If it takes a runner 15 minutes to run a mile how many miles would he run in two and half hours.
May 5, 2014

math
If it takes a runner 15 minutes to run a mile how many miles would he run in two and half hours?
May 5, 2014

pre calculus
a gun with a muzzle velocity of 1200 feet per second is fired at an angle of 6 degrees above the horizontal. find the component form of a vector. verify the magnitude
May 5, 2014

Math
The quarterback of a football team releases a pass at a heights of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. The parametric equations for ...
April 21, 2014

Precalculus
The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. The parametric equations for the...
April 21, 2014

trig
A plane is flying due south at a speed of 192 mph. a wind is blowing in at 53 degrees at 13 mph. what is the bearing of the plane?
March 27, 2014

Math-Statistics
Assume your expected lifetime income is $1.5 million and the standard deviation is $250,000. a) What is the chance that you will earn more than $1.1 million during your lifetime? b) What is the chance that you will earn less than $2 million during your lifetime? c) What is the...
March 24, 2014

english
Which synonym of the word look would be most effective in the following sentence? Detective Flint leaned forward with narrowed eyes to _______ what appeared to be a vital clue. A. survey B. scrutinize C. view D. ogle I think it's B.
March 21, 2014

Science
All them are wrong.. Just thought I would tell you
March 20, 2014

geometry
A person riding the original Ferris Wheel is traveling at a speed of 0.495 mph. If one revolution takes 9 minutes, what is the diameter of the Ferris Wheel? Show your work.
March 19, 2014

health
Drinking in moderation or not drinking at all will typically lead to? A. Weight gain B. Heart disease C. Weight loss D. High blood pressure
March 18, 2014

Math
XY= -25 what is the constant of variation for this relationship? a. 1/4 b. -25 c. -2.5 d. -0.4
March 11, 2014

math
A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more then 30 cents in it?
March 8, 2014

math
A truck drove 1400 miles at a rate twenty miles per hour slower on the return trip. If the trip took 22 hours total, how fast was the truck going on the return trip? Round your answer to the nearest hundredth.
February 27, 2014

math
Find the original price of a pair of shoes if the sale price is $56 after a 20% discount
February 24, 2014

Math
Thanks everyone
December 14, 2013

Math
SO ITS 20 PEOPLE?
December 14, 2013

Math
a restaurant charges a reservation fee of $15 for its party room, plus $21.50 per person. If the bill was $445, how many people were at the party? HELP PLEASE! IS THE ANSWER 30?
December 14, 2013

chemistry
2. What is the percent yield of Mg3N2 if 73.9 g of Mg reacts with 31.6 g of N2 to produce 79 g of Mg3N2 according to the following chemical reaction? (Reaction may or may not be balanced.) mg+n2=Mg3N2
November 26, 2013

Geometry
Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter. and there's a ...
November 20, 2013

American Governent
List and Explain three duties of members of the executive office of the president.
November 11, 2013

math
identify an integer x for which 2x/5 represents a ratio greater that 2:1 but less than 3:1 could 2.4 be a possible answer?
November 11, 2013

math
anyone...PLEASE!!!
November 11, 2013

math
I really need help with this problem! Thanks so much!
November 11, 2013

math
identify an integer x for which 2x/5 represents a ratio greater that 2:1 but less than 3:1
November 11, 2013

Math
In a AAA map of Ohio, 1 inch equals approximately 10 miles or 18 kilometers. If the distance on the map between Pauling and Eaton is 9.8 inches, how many kilometers is it between the two towns?
November 11, 2013

chemistry
n an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?
October 21, 2013

geometry
For 1 through 10, what is the area and volume of the given shape, if the length of one side of the base is 6, the height is 8, and the slant height is 10? (Not all shapes will require all three numbers.) The shape is a right prism with: 1. an equilateral triangle as the base
September 23, 2013

prealgerbra & introductory algebra
-22+y=y/-14
September 21, 2013

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

Intermediate Algebra
y/11=3
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
An adult house cat could be about 1____ high.
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

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