Saturday
February 28, 2015

Posts by ANONYMOUS


Total # Posts: 78,257

Calc
Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).
January 18, 2015

physics
A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
January 18, 2015

physics
Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
January 18, 2015

physics
You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2. Find direction...
January 18, 2015

physics
An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two significant figures
January 18, 2015

PED 121
Question 3. 3. Lesson plans should be infused with local, state and national standards in order to support (Points : 1
January 18, 2015

Math
How do you write a quadratic equation with information saying that it opens upward, has a pattern of 1, 3, 5, and a vertex of (-4,5)?
January 18, 2015

Mathematics arithmetic sequence
14-3n
January 18, 2015

statistics
The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .32. a. How large a ...
January 18, 2015

chemistry
Lol
January 18, 2015

physics
A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
January 18, 2015

physics
Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
January 18, 2015

physics
A model rocket is launched straight upward. Its altitude y as a function of time is given by y=bt−ct2, where b = 80m/s , c = 4.9m/s2 , t is the time in seconds, and y is in meters. 1. Use differentiation to find a general expression for the rocket's velocity as a ...
January 18, 2015

chemistry
The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound?
January 18, 2015

Physics
the coefficient of friction between block A and the horizontal surface is 0.43. What must be the weight of teh hanging block B if this block is to descend at constant speed once it has been set into motion? Mass of block A is 5.0 kg
January 18, 2015

Alcohols,phenolsðers
I asked this question & wanna know ANS
January 18, 2015

Alcohols,phenolsðers
How2 convert CH3OH into CH3CH2OH
January 18, 2015

Calculus
1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a path described by y=4-...
January 18, 2015

French
Is "vieil homme" or "homme vieil" correct? I think it is the former because it describes age.
January 18, 2015

Chemistry
5
January 17, 2015

Science
guys, please give me any ideas for a investigatory project in physics ???
January 17, 2015

math
thank you so much Ms.Sue :))
January 17, 2015

math
• what is statistics • Perspective statistics • inferential statistics • Data statistics • Example of a Quantitative data • Example of a Qualitative data • What is population •what are the different scale of measurement • what are ...
January 17, 2015

Calculus
1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a path described by y=4-...
January 17, 2015

engineering
In an electric car, regenerative braking is used to recharge batteries. The principle of regenerative braking involves converting the kinetic energy of the vehicle into energy stored in a battery. If a car is traveling at a speed of 30 km/h and is stopped completely by braking...
January 17, 2015

AP CHEMISTRY
an unknown metal reacts with chlorine to produce 6.84 g of metal chloride. when metal chloride dissolves in 100 mL of solvent the metal ion concentration is 0.43 M. What is the unknown metal?
January 17, 2015

algebra
the picture will be hung on a wall where the distance from the floor to ceiling is 8 feet. The center of the picure must be 5 1/4 feet from the floor. Determine the distance from the ceiling to the top of the picture frame.
January 16, 2015

Math
Miguel is 5 feet 10 inches tall. On a sunny day he casts a shadow 4 feet 2 inches long. At the same time, a nearby electric tower casts a shadow 8 feet 9 inches long. How tall is the tower? How do I set this up into ratios to figure out the tower height?
January 16, 2015

Math
A blue rope is three times as long as a red rope. A green rope is 5 times as long as the blue rope. If the total length lf the three ropes is 508.26 meters, what is the length of the blue rope?
January 16, 2015

math(5th grade)
Pls help me
January 16, 2015

physics
A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 89.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...
January 15, 2015

Biology
You need to prepare a 0.25 M solution of NaCl but you only need 50 ml of this solution. How many grams of NaCl would you need?
January 15, 2015

Biology
How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?
January 15, 2015

Biology
You need to make 2.5L OF 3M H2SO4. H2SO4 comes as a stock solution in a concentration of 18M. How many ml of stock H2SO4 would you need to make the new solution?
January 15, 2015

5th grade science
How might the history of the United states be different if the first European settlements had occurred on the west coast instead of the east coast
January 15, 2015

Math
When a tire is labeled "185/70/14" that means it is 185 mm wide, the sidewall height (from the rim to the road) is 70% of its width, and the wheel has a diameter of 14 in. What is the tire's sidewall height?
January 15, 2015

science
Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way to Chesapeake Bay Maryland, this is an example of _____________ pollution.
January 15, 2015

SS
Did the Spanish come to the Americas with Columbus, or did they come later?
January 15, 2015

SS
But did he ever come to know of the truth?
January 15, 2015

SS
Did Columbus come to know that he was not in India when he reached the Caribbean? I find mixed answers online.
January 15, 2015

alegbra 1
x+y=5 x-3y=3
January 15, 2015

math
cost of levelling of circular ground @ 25 paisa/square meter is 2500.Help me find the radius of this ground
January 15, 2015

solid mensuration
a high way curve is to be laid out on a circle. what radius should be used if a trailer truck is to change direction by 28 degrees in a distance of 112 meters?
January 15, 2015

solid mensuration
a certain city block is in the form off parallelogram. two of it's side are each 225 meters long, the other two sides are each 145 meters long. if the distance between the first two pair is 80 meters. find the area of the land in the block and the length of the diagonals.
January 15, 2015

Math
When Minnesota became a state in 1858 there were approximately 150,000 people living here. in the 2010 census the population for Minnesota was 5,303,925 people. Find a model that would apprxoimate the population in Minnesota between 1858 and 2010. Let t=0 correspond to 1858. ...
January 14, 2015

health
if a client is working on reducing stress what should the fitness professional suggest as a first step
January 14, 2015

Logarithms
Prove that log base a of x divided by log base a/b of x is equal to 1+log base a of(1/b) Where do I start?
January 14, 2015

Calculus POwer RUle
If the slope of the curve y=−kx^3+ 3k at x=-2 is 3, then what is the value of k?
January 14, 2015

School
Okay, Thanks to both of you!
January 14, 2015

School
Like for example when he talks about Eli Whitney and Interchangeable parts we have a little section in the notes that we have to fill in but we do it after he's done talking. Even though he'll tell us what goes in the blank, I miss information he tells us beforehand
January 14, 2015

School
Yeah he usually gives us printed notes where we just fill in blank spaces. He tells us what to fill it in with after he's done talking about the topic. But before we fill in the notes, he usually explains to use the topic which where I drift off
January 14, 2015

School
Because I'm not the type of learner who can just sit there and remember the information so I just hope there are some tips
January 14, 2015

School
I have a question.. So my teacher just talks the whole class about information and the thing is.. I'll be listening but then after awhile I'll accidentally wander off and just miss information I needed to know. Are there good tips for me to just stay focused the whole ...
January 14, 2015

history
thanks!
January 14, 2015

history
Which of the following was neither part of the Confederacy nor th eUnion? A. Minnesota b. Texas C. Michigan D. Colorado Minnesota? On second thought, Michigan???
January 14, 2015

science
I grand daughter has this fill in the blank: Electically__________ objects push or _____________ on other electrically charged objects. This produces___________. Please fill in the blanks please. Because we don't know... Thanks!!!!
January 14, 2015

Math
So that means d wasn't correct?
January 14, 2015

Math
Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is the cost of ...
January 14, 2015

Physics
Two identical objects of the same mass and at the same initial temperature cool off. If object A cools off faster than object B, what can you say about the specific heats of the two objects?
January 14, 2015

math
thank you yes it is hard to explain
January 14, 2015

math
Ms. Sue can you please help?
January 14, 2015

math
I just want to see if my answers are correct and if no, can you please show your work and explain how to do it? Thank you. A. (x^1/2)^4√x^6 I got an answer of x^2x B. √x^4y^12 I got an answer of xy C. 3√a^6b^3 I got an answer of a^2b D. (x^1/3y)^3√x^2y^...
January 14, 2015

Law
many attorneys pose issues beginning with the word: a. "here" b. "now" c. "whether" d. "whatever" My answer: C
January 14, 2015

math
whats 9+10
January 14, 2015

math
You need to hire a part-time associate to work 30 hours a week in your store. You have $250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid $9.00 per hour. Your average part-time ...
January 14, 2015

accounting
n kjj
January 13, 2015

algebra
One evening 1500 concert tickets were sold for the Fairmont Summer Jazz Festival. Tickets cost $25 for covered pavilion seats and $20 for lawn seats. Total receipts were $35,000. How many of each type of tickets were sold? Let x equal the number of pavilion seats sold. Let y ...
January 13, 2015

Calculus II Help Please
Only question I can't do on the assignment In pharmacokinetics the area under the graph of the drug concentration function with respect to time can be used to determine the total amount of the drug absorbed (the area is actually proportional to the amount of the drug ...
January 13, 2015

algebra
solve the system of equations using the substitution method 8x - 9 = y y - 8x = -4
January 13, 2015

algebra
Solve using the substitution method. -8x + y = 18 9x + 13y = 8
January 13, 2015

science
homozygous line of normal-hearing dogs was crossed with a homozygous line of deaf dogs. F1 and F2 generations were produced. What percent of F1 generation is expected to have normal hearing? What is a phenoeyeic ratio of the F2 generation?
January 13, 2015

Math
A flagpole casts a shadow of 23.5 feet long.at the same time of day, Ana, who is 5.5 feet tall, casts a shadow that is 7.5 feet long. How tall in feet is the flagpole?
January 13, 2015

Law / Legal
many attorneys pose issues beginning with the word: a. "here" b. "now" c. "whether" d. "whatever" I think it's C
January 13, 2015

science
Which systems move the human body? I heard there were the skeletal, nervous, and muscular system. ??
January 13, 2015

algebra
Solve the given system by the substitution method. 3x + y = 17 5x -2y = 10
January 13, 2015

algebra
solve the system of equations using the substitution method 8x - 9 = y, y - 8x = 4
January 13, 2015

algebra
solve for x using the substitution method -8x + y = 18, 9x + 13y = 8
January 13, 2015

Chemistry
The overall reaction in a commercial heat pack can be represented as shown below. 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) ΔH = -1652 kJ How much heat is released when 4.00 mol iron is reacted with excess O2? How much heat is released when 1.00 mol Fe2O3 is produced? How much heat is...
January 13, 2015

math
Thanks
January 13, 2015

math
Jill has a total of 12 1/2 hours of football practice after school five days a week. a. How many hours of practice will he have for 15 school days? I think the answer is 37 1/2 hours. b. How many hours of practice will he have for 22 school days? I think that the answer is 55 ...
January 13, 2015

math
According to the 2003 U.S. Census, approximately 129 million americans spend 3.4% of a 24-hour day commuting. How many minutes a day does a person in this group spend commuting?
January 13, 2015

Math
Jay's term paper is 18 pages long. If Madison's paper is 175% of the length of Jay's paper, find the length of Madison's paper.
January 13, 2015

SS
Why do less than half of the people in Russia possess a TV/radio?
January 13, 2015

math
Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is the cost of ...
January 13, 2015

Pre-Calc/Trig
nvm, i figured this one out
January 13, 2015

Pre-Calc/Trig
write an equation of the conic section: a hyperbola with vertices (0,-6) and (0,6) and asymptotes y=(3/4)x and y=(-3/4)x
January 13, 2015

English
Get an education, or you are doomed to flip greasy burgers for the rest of your life! Which propaganda technique is used in this sentence?
January 13, 2015

math,trigonometry
how do i state the law of sines and cosin in words ??
January 13, 2015

Algebra
Dhvdt sidekick when subway swings windup Kelly's webmail
January 13, 2015

physics
masses of 3,5,7,8 kg are suspended at equal distances of 1 m from rod.Find the CG of the arrangement.
January 13, 2015

Math
How to simplify (x-3)/(2x) - (4x + 3)/4?
January 13, 2015

Spanish
We have to sell it to her. 19. Tenemos que vendér BLANK. 20. BLANK tenemos que vender.
January 13, 2015

Math
x=4 dresses
January 12, 2015

Math
A total of 10,000 is invested into two funds paying 7.5% and 9% simple interest. The combined annual income for the two funds is $849. Determine how much is invested at each rate
January 12, 2015

Calculus
Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).
January 12, 2015

Calculus
Okay, what are the rules for determining positive, negative, or zero?
January 12, 2015

Calculus
I get mixed up when graphing derivatives. If I'm given the graph of f how do I get f' and f"?
January 12, 2015

Math
(-y^2)^2= ?? Is it -y^4? A negative answer??
January 12, 2015

Physics
A particle with a mass of 1.55 kg is acted on by a force Fx acting in the x-direction. If the magnitude of the force varies in time as shown in the figure below, determine the following.
January 12, 2015

Physics
As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision and become coupled ...
January 12, 2015

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