Tuesday

March 3, 2015

March 3, 2015

Total # Posts: 78,416

**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*

**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*

**physics**

Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 160,000 kg and a velocity of 0.300 m/s, and the second having a mass of 115,000 kg and a velocity of -0.120 m/s. (The minus...
*January 12, 2015*

**clothing an textiles**

six ways in which control fullness in a garment explain any two methods
*January 12, 2015*

**Physics**

A 4.00-g bullet is moving horizontally with a velocity vector v = 348 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. ...
*January 12, 2015*

**physics**

A 51.5-kg skater is traveling due east at a speed of 2.70 m/s. A 69.5-kg skater is moving due south at a speed of 7.50 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find the following.
*January 12, 2015*

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