Posts by Sarah

Total # Posts: 5,909

Social Studies
Why did Japan need to rebuild its economy following World War 2

math
I just want to check to make sure I am correct -- my equation is y = -x^2 + 90x - 800 If x = 100, -x^2 would be 10,000, not -10,000? Because -100 x -100 is 10,000, not -10,000 --- my calculator keeps giving me a negative number. So my overall number is 18,200

Math
True

English
Really? I dont.can I get a link that shows how to format it?

English
Yes. We are allowed to write a narrative story

English
I'm supposed to be doing it on the short story pauls case. But it's supposed to be a personal response so I wanted to write a short story

English
What do these texts suggest to you about ways in which individuals pursue or compromise their happiness? Can I please get a thesis? Like a general one without including the texts. I'm having trouble figuring it out.

algebra
a bathtub in your home has a drain that leaks. When you fill you bathtub with 30 gallons of water you notice that after every 5 minutes you only have 20 gallons remaining, so the drain is leaking 2 gallons every minute which represents slope. what is the linear equation of the...

chemistry
Most top-loading balances used in this experiment measure a mass only to the nearest mg(+_0.001g).? This significantly affects the calculation of R in this experiment. Explain why this is so. How might the procedure be modified to compensate for this systematic error?

chemistry
What would be the effect on the calculated value of R of each of the following experimental errors? Explain each answer. a. the liquid level in the eudiometer tube is lower than that in the beaker, but this is not taken into consideration in the calculations. b. the balance ...

Trigonometry
And if I choose 4 as the radi. Then would it be: sin (315°)= y/4 4 sin (315°)= -2.8284 So that is the y value. Cos (315°) = x/4 4 cos (315°) = 2.8284 So that is the x value ?

Trigonometry
I'm having trouble doing trigonometry. Determine the possible coordinates of a terminal point for each angle in standard position. A) 315° I have no clue how to do this. Please explain and show me the work so I can do the rest of the questions myself

Algebra
What happens to the mean of a set of data if you add a constant value to each data piece?

Chemistry
So my answer is right?

Chemistry
Determine the molar concentration of sodium oxide if 3.91g of solid was added to 525mL of solution. I am not typing my entire work in but I calculated these values: V=525 ml= 0.525L N= 0.0603084866 Would it be 0.120 mol/L

Science disscussion
Really? I have been waiting all this time for this?

Science disscussion
What form of pollution, if any, does each energy source cause How does the economy influence energy source choices How does location influence energy source choices

Math
An archer shoots an row into the air such that it's height at any time, t, is given by the function h (t)= -16t^2+kt+3. If the maximum height of the arrow occurs at time t=4, what is the value of k? A) 128 B) 64 C) 8 D)4 What I did: H (t)= -16t^2+kt+3 4= -16 (4)^2+ k(4)+3 ...

literature
what method does jerry use to lie underwater on the sea floor? a. he wears swimming goggles b.he dives holding on to a big rock c.he dives past the older boys d.he counts to 115 Is it b? PLEASE HELPPP QUICK

Chemistry
Would it be SO4 2-

Chemistry
you are given two unlabelled colorless solutions: AgNO3(aq) and Ca(NO3)2. A)Which ion when added to each unlabelled solution would produce a precipitate with the calcium and silver ions? No clue what this question is asking. Can I get help?

Math
A ball is thrown from a cliff. This is modeled by the eqn h=-5t^2 +5t+210 How long does it take the ball to reach a height of 60m? I don't understand how to find this, please help.

Math
Describe the following transformations on y=x^2: y=-4(2x+10)^2 -7

Math
The population of a town is modelled by P=-0.1x^2+1.2x+4.4 where x is the number of years since the year 2000, and y is the population in thousands. a) In the year 2005, what is the population? I used the equation, put x=5 and I got 7900 as the population. b) In the year ...

Functions
Describe the following transformations on y=x^2: y=-4(2x+10)^2-7 I really don’t understand transformations, please help

Math
Round 6784 to the nearest thousand, hundred and ten

Math
A basketball is tossed from the top of a 3m wall. The path of the basketball is defined by the relation y=-x^2+2x+3 where x represent the horizontal distance travelled, in metres, and y represents the height, in metres, above the ground. A) How far has the basketball travelled...

Math
Two factory plants are making TV panels. Yesterday, Plant A produced 9000 panels. Ten percent of the panels from Plant A and 3% of the panels from Plant B were defective. How many panels did Plant B produce, if the overall percentage of defective panels from the two plants was...

GEOMETRY
What are the steps for using a compass and straightedge to construct a square?

Computer Science
You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

Computer Science
You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

Chemistry
For potential and kinetic energy when it comes to phase change, do the temperatures remain constant in one of them? I forgot which one it was. Can you help?

GEOMTRY
I REALLY NEED HELP IN THIS 2 COLUMN PROOF Complete the two-column proof. Given: is complementary to . bisects . Prove: is complementary to .

Physics
if a machine is capable of accelerating at a constant speed of +20.0m/s^2 calculate the time required for it to go from -5.00m/s to +55m/s

Chemistry
Oh okay. We didn't learn that as of now. But I'll include that into my answer.

Chemistry
Oh okay. We didn't learn that as of now. But I'll include that into my answer.

Chemistry
Is cl2 or F2 less volatile? Cl2 is less volatile because it has more intermolecular forces and therefore has a higher boiling point. Is this right?

English
Okay thank you for the help

English
What ideas does the director develop regarding the conflict between pursuing a specific desire and choosing to conform? Rewrite as a How/Why question in your own words. In my own words: What ideas does the director say about being in an internal conflict with yourself, of ...

math
Oh okay. Because what I found: The current temperature in Smalltown is 20 °F. This is 6 degrees less than twice the temperature that it was six hours ago. What was the temperature in Smalltown six hours ago? One reading at an Arctic research station showed that the ...

math
What was the temperature? Reread what you wrote because I think some information is missing or it autocorrected.

Pre-calculus
How do I factor this: 6m^2 + 7mn + n^2 I really don't understand this one

Pre-calculus
I have a really basic question. Say I have a rational expression and my numerator is 4xy. Am I allowed to factor out just the x or just the y? For example y(4x)?

Pre-calculus
Thank you! That helped me a lot and I understand it now.

Pre-calculus
Hi, How do I simplify and state the restrictions on the following: 12x^8y^9 / 3x^4y^6 what do I need to factor out? I'm so confused, I never know what I'm allowed to factor out.

Chemistry
Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and sodium sulfide are combined.

Math
Would I need to add || absolute value around any variables?

Math
I'm having trouble understanding when I am supposed to add absolute values when simplifying radicals. (It's cube root not square root) XER and YER because it's a cube root and you can take cube root of negatives and positives. ?-108x^7y^9 = ?-27•4•x^6&#...

Math
Evaluate : -5|1-3|+4|3-1| -5|-2|+4|2| -5 (2)+4 (2) -10+8 -2 Is this right?

Math
Factor: 50 (2x-5)^2 -162 (3y-2)^2 I'm not even sure how to do this. I've tried it for so long and I've been trying multiple ways. I don't know how to factor these. May I get a step to step explanation or work please?

science
c6h12o6(aq)+6o2(g)->6co2(g)+6h2o(l) ?h=-2820kj c2h5oh(aq)+3o2(g)->2co2(g)+3h2o(l) ?h=-1380kj hitunglah reaksi c6h12o6(aq)->2c2h5oh(aq)+2co2(g)

Math
Oh never mind. I realized my mistake. It was 4 1/4 in the question but I accidentally changed it to 1 1/4. Thank you so much for the help though

Math
I've tried that. And I either get |-5.75| or I get 5.75 which are the same thing

Math
Use absolute value to determine the distance between the two numbers. -3.5 and 4 1/4 |-3.5- 1 1/4| |-3.5- 9/4| |-3.5/1 - 9/4| |-14/4 - 9/4| |-23/4| 23/4 5.75 I got 5.75 as my answer. But why does my answer key show 7.75 units? I'm not sure what I did wrong. I've double...

Social studies
2: How might the Iroquois have been helpful in assisting the British troops in the surprise attack? a- the Iroquois likely had better knowledge of the area and could lead the British troops through the woods b- the Iroquois likely had better knowledge of the habits of the ...

math
A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 18° with the horizontal. The flagpole casts a 14-meter shadow up the slope when the angle of elevation from the tip of the shadow to the sun is 21°. (b) Write an equation ...

chemistry
What is the change in ph after addition of 10.0 ml of 1.0 m sodium hydroxide to 90.0 ml of a 1.0 m nh3/1.0 m nh4+ buffer? [kb for ammonia is 1.8 x 10-5]?

chemistry
Methane (CH4) is the main component of natural gas. It is burned for fuel in a combustion reaction. The unbalanced combustion reaction for methane is shown below. CH4 + O2 CO2 + H2O + heat When the reaction is balanced, how many carbon dioxide molecules are produced for every ...

chemistry
What is the pH of a weak acid solution that has an [H*] of 2.1×10^6 M?

Math_ Geometry
The sum of the interior angles of a regular polygon equals 1260 degrees. How many sides does a polygon have?

Physics
A person runs off a cliff. The person runs with a speed of 10 m/s and is moving to the right as he leaves the cliff. The cliff is 13 meters above a pool of water. a) Determine the acceleration of the person after leaving the cliff (x and y components). b) Determine the time it...

college history
What were the events in Germany, Russia, and Ireland after World War I? My history textbook does not discuss the question at all. Please help. I need to know the answers in preparation for the test I have tomorrow. Thank you.

Econ Online
market competition pushed a price down toward its market-clearing level. Which of the following BEST describes they type of competition that would cause lower prices 1) Competition between buyers and sellers 2) Competition among sellers 3) Competition among buyers 4) ...

Econ
explain the economic effects of a price floor at $8. Be sure to reference quantity, shortage or surplus, etc.

Econ Online
Popcorn and coke are complements because the are often enjoyed together. When the price of coke rises, what happens to the supply, demand, quantity supplied, quantity demanded, and the price in the market for popcorn?

Econ Online
Analyze what happens to the market for cheeseburgers if the price of the cheese rises (cheese being the part of the cost of a cheesburger). Be specific and explain (or is not affected) for each of the following: 1. supply curve 2. the demand curve 3. the equilibrium quantity 4...

Physics
Two blocks of identical mass are placed in water. One is made of aluminum, the other of wood. The wood block is noted and therefore floating. Upon which is the buoyant force greater? 1) on the aluminum block, 2) on the wood block or 3) they both experience the same buoyant ...

Physics
Two blocks of identical mass are placed in water. One is made of aluminum, the other of wood. The wood block is noted and therefore floating. Upon which is the buoyant force greater? 1) on the aluminum block, 2) on the wood block or 3) they both experience the same buoyant ...

physics
A mass is attached to a horizontal spring and compresses the string by 10 cm (position A). when it is released, it bounces back and stretches the spring by 10 cm (position B). Compare the potential energies at position A and B. The choices are 1). A>B, 2) A=B 3)A<B or 4...

algebra
once I find the time, which would be in a xx.xx format, I would calculate the distance at d=rt , correct?

algebra
During a hurricane evacuation from the east coast of Georgia, a family traveled 450 miles west. For the first part of the trip, they averaged 25 mph less than the second part, where their average speed was 62mph. If the total time of travel was 9 hours, how many miles did they...

Social
Oh okay thank you Ms. Sue and Reed So to clarify: My 2nd argument can be: Transnational Corporations and how it causes pollution which can be harmful for people that work in factories. And industrialization as well and manufacturing of products. My 3rd argumenet: The ...

Social
Isn't that connected with my second argument though? Or if what u told me can be my 3rd argument how can I change the 2nd so they aren't as similar?

Social
My essay needs to be about impacts of globalization on human rights. My thesis statement is: there are negative impacts of globalization on human rights to a great extent. And for it, I mean globalization

Social
I need help. I have to do an essay for globalization and human rights. I have 2 arguments: 1) it represents a challenge to cultural and local languages. So I'm going to be talking about Al-Jazeera and how the languages are slowly being disappeared. I'm also going to ...

math
Thomas is thinking of a number, if he doubles his number and subtracts 27, he gets 407. Whats his number?

Science physics
Ohhh. That's what I missed. Okay thanks for explaining step by step. It helped a lot

Science physics
Ohhh. That's what I missed. Okay thanks for explaining step by step. It helped a lot

Science physics
Ohhh. That's what I missed. Okay thanks for explaining step by step. It helped a lot

Science physics
The question is asking for work though. And the answer says it's 88J but I don't get how they got that as the answer

Science physics
mandy drops a 2.0kg book from a height of 4.5m. how much work has gravity done on the book? M=2.0kg D= 4.5m Not actually sure what to do next. Because none of the formulas work. I need work but I don't even know the force. To find force I need mass which I have but I don&#...

Science
Oh. That makes sense. I misunderstood and thought 0.5 had 2 significant figures but it has 1. Thank you so much!

Science
However the answer on my answer key says 5×10^1 N. I'm confused on how they got that

Science
A bicycle and its rider have a combined mass of 90kg. The cyclist is accelerating at 0.5m/s^2. What minimum force is he exerting? F=m•a F=90kg•0.5m/s^2 F= 45N However the answer on my answer key says 5×10^1

Math
Starting at the top, if you cut a square pyramid in half using a single cut, what is the shape of the newly-exposed section?

Science
why is using a ramp to load a heavy object into the back of a moving truck easier than lifting it in?

Language arts poetry
in the poem the tide rises the tide falls Longfellow uses figurative language in repetition in a paragraph identify the symbolism and repetition used in the poem explain how both are connected to the meaning of the poem include details from the poem in your paragraph The tide ...

Physics
A 10.0 kg box is placed on a ramp that is inclined at 30.0 degrees to the horizontal. Determine the force of friction required to keep the block stationary. Determine the minimum coefficient of friction required to keep the box stationary.

Physics
A 12.0 kg object is on a surface that is inclined 30 degrees and the coefficient of friction is 0.65. Determine the force of static friction if the block remains stationary.

Physics
two basketball players collide player 1 with a mass of 55.0 kg experiences a -15.6 m/s2 acceleration. if the player 2 has a mass of 48.5 kg what acceleration did he experience immediately following the collision?

Physics
1. What happens to the stack of books if the applied force exceeds the maximum static frictional force? 2. What is the minimum size for the static frictional force, and under what conditions will the minimum static frictional force be observed? 3. What type of friction acts ...

math
For exersizes 1-4 describe the population, the sampling plan, and the sample 1. A magazine for teenagers asks its readers to write in imformation about how they solve personal problems

chemistry
Initially you have 204 g grams of solid thallium at is at its melting point of 304ºC . How many grams of liquid thallium will be present after 476 joules of heat have been added. specific heat liquid thallium is 0.13j/g ºC; heat fusion = 21 j/g; boiling point ...

Physics
A 34.0 kg block accelerates along a frictionless ramp that is inclined at 35 degrees. Determine the acceleration of the block.

Physics
A 12.0 kg object is on a surface that is inclined 30 degrees and the coefficient of friction is 0.65. Determine the force of static friction if the block remains stationary.

Physics
A plane with a mass of 4.50 x 10^3 kg accelerates on takeoff at 10.0 m/s2. What is the net force acting on the plane?

Physics
Two basketball players collide. Player 1, with a mass of 55.0 kg, experience a -15.6 m/s2 acceleration. If player 2 has a mass of 48.5 kg, what acceleration did he experience immediately following the collision?

science
the fence posts around a large pasture are 2.5m apart. a horse starts running west beside the fence. when the horse passes the fifth fence post, your second hand is on the 9.0 mark. when the horse passes the fourteenth fence post, the second hand is on 11.5 seconds. what is ...

Science - physics
the fence posts around a large pasture are 2.5m apart. a horse starts running west beside the fence. when the horse passes the fifth fence post, your second hand is on the 9.0 mark. when the horse passes the fourteenth fence post, the second hand is on 11.5 seconds. what is ...

Organic Chemistry
(i can't upload an image so i have to explain the spectrum) My spectrum has peaks at 0.85 ppm (integration = 1.49) 1.2 ppm (integration = 7.93) 1.5 ppm (integration = 1.11) 3.6 ppm (integration = 1) the only one that shows clear peaks is the one at 3.6 ppm, which appears ...

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