Tuesday

October 21, 2014

October 21, 2014

Total # Posts: 2,432

**Math**

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet per minute. If the pool has radius 6 feet and height 10 feet, what is the rate of change of the height of the water in the pool when the depth of the...
*October 21, 2014*

**Math**

A sphere has a volume of 200m3 . What is the volume of the smallest cube that this sphere would fit inside of? (Hint: try drawing a diagram of a side or top view of this situation)
*October 14, 2014*

**pre cal**

How fast is the tire traveling in mph if it does 2 rotations in 2 seconds with a diameter of 27 inches for the tire?
*October 13, 2014*

**statistics**

A congressional committie has of 8 senators and 7 representatives. How many ways can a subcomittie of 6 be formed from the full committee if exactly 5 of the members must be senators?
*October 10, 2014*

**Math**

A cylinder has a surface area of 250cm2 . The height is twice as big as the radius. What is the height of the cylinder?
*October 3, 2014*

**algebra**

5 (x + 10) + x ?? 6x + 15 5x + 15 6x + 50 4x - 50
*October 1, 2014*

**chemistry**

A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.
*September 30, 2014*

**biology**

there just fill in a blank questions
*September 30, 2014*

**biology**

_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.
*September 30, 2014*

**history**

They all how a part in reform. I would have to change to Plessy v. Ferguson because of it was just between the races and not everyone
*September 27, 2014*

**history**

Muckrackers
*September 27, 2014*

**history**

There were many examples that inspired the reform-minded spirit after 1900. Which was not an example? Muckrakers Plessy v. Ferguson Triangle Shirtwaist Factory fire The Jungle
*September 27, 2014*

**Trigonometry**

The wheels of a scooter have a diameter of 4.5 inches. If the person riding the scooter is traveling down hill at 15.0 mph. what is the approximate angular speed of the wheels in radians per second
*September 25, 2014*

**chemistry**

A mothball, composed of naphthalene (C10H8), has a mass of 1.10g
*September 24, 2014*

**chemistry**

A helium balloon contains 0.30g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
*September 24, 2014*

**Physics**

A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of the cannon’s barrel and strikes the ...
*September 23, 2014*

**Physics**

An ice skater skates 13.3 m southwest, then 26.6 m east, and finally 39.9 m in a direction 51.5◦ north of east. Find the magnitude of the displacement required to bring the skater back to her starting point. Answer in units of m
*September 22, 2014*

**physics**

A child rides a toboggan down a hill that descends at an angle of 20.7◦ to the horizontal. The hill is 18.2 m long. What is the horizontal component of the child’s displacement?
*September 21, 2014*

**math**

thank you so much i get it now !! :)
*September 13, 2014*

**math**

simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i dont uderstand how to do it. can you please show me the steps. thanks
*September 13, 2014*

**math**

-10+8=8+(-10) name the property illustrated
*September 12, 2014*

**algebra**

mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
*September 10, 2014*

**Math**

mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
*September 9, 2014*

**government**

Judges espousing a philosophy of original understanding maintain that school desegregation cases decided on the basis of the Fourteenth Amendment were wrongly decided because? 1 he original intent of the framers was to defer to the will of legislative bodies. 2 we do not know ...
*September 5, 2014*

**government**

laws that discriminate must be said to reflect the will of the majority.
*September 5, 2014*

**government**

Originalists often hold that it is incorrect to use the Equal Protection Clause of the Fourteenth Amendment to strike down laws that discriminate because
*September 5, 2014*

**Math**

A recipe that makes 4 servings calls for 3 / 4 cup of apple juice and 2 / 3 cup of cranberry juice. How many cups of juice are there per serving?
*September 4, 2014*

**Math**

Perfect, well done!
*August 31, 2014*

**statstics**

a report says 65% of vechiles sold were SUV's. A random sample of 100 vechiles sold in last month is taken. Use the central limit theorem, find the probability that most 70% of the vechiles in the sample were SUV's
*August 25, 2014*

**algebra**

what is the equation of a parabola whose vertex is (6,0) and whose graph is half as tall as y=x^2 and opens upside down
*August 23, 2014*

**statistics**

You want to estimate the difference in grade point averages between two groups of university students to be accurate within 0.2 grade point, with probability approximately equal to 0.95. If the standard deviation of the grade point measurements is approximately equal to 0.6, ...
*August 13, 2014*

**College English**

disunity or lack of confederation amongst various tribes caused considerable weakness in their profile as "THE" indian nation as WHOLE... thus they were dismembered and placed on reservations.. by 1825 the last major tribes were sent across the MISSISSIPPI RIVER.. ...
*July 28, 2014*

**statistics**

the daily milk production for a certain type of dairy cow has a mean of 43 pounds per day with a standard diviation of 5 pounds per day. Suppose this daily mild production has a normal distribution. Calculate the probability that a randomly selected cow of this type has a ...
*July 17, 2014*

**Calculus**

Thank you so just to clarify for a) all you did was take the integral of the acceleration to get your v(t) function. Then for b) do you set v=2+3t equal to 14? c)You just take the integral of v(t) to get position function I think.
*July 6, 2014*

**Calculus**

A particle moves with a fixed acceleration of 3 m/s^2. If its initial velocity is v(0)= 2 m/s, and its initial displacement is s(0)= 0 A)Find its velocity function v(t) B)How long does it take for the particle to reach the velocity 14 m/s? C)Find the distance traveled when its...
*July 6, 2014*

**math**

convert y=2x^2+5x-5 into vertex form
*July 4, 2014*

**AP Macroeconomics**

nobody likes you :(
*July 3, 2014*

**Calculus**

Given f(x) = csc^4(5x^2-3x+1), find f'(x). Show all work.
*June 23, 2014*

**English**

I need to find a sensationalised news article homework a and then highlight sensational parts please help'!!!
*June 21, 2014*

**math**

Perform a one-way ANOVA analysis, testing at the 0.05 level. Also, calculate the mean number of sick days for each group. Describe your results. . Group Sick days per year Placebo: 7, 4, 6, 8, 6, 6, 2, 9 Flu Shot 1: 5, 3, 3, 5, 4, 7, 3, 3 Flu Shot 2: 2, 4, 1, 2, 2, 1, 2, 5
*June 21, 2014*

**Statistics**

I began to think of the binomial distribution with the common heads or tails coin flipping experiment example...I believe my question in #3 is related to that, and in fact I think the generalization is what applies, the "multinomial" distribution...any thoughts from ...
*June 12, 2014*

**Statistics**

You have these 10 observations of some event X: 1.03 1.022 1.022 1.01 1.026 1.02 0.95 1.005 1.05 1.023 Here is the sorted list from least to greatest: 0.95 1.005 1.01 1.02 1.022 1.022 1.023 1.026 1.03 1.05 Based on this data alone: 1) It makes sense to say P(X <= 0.95) = 1/...
*June 12, 2014*

**Pre algebra**

Sophie has 5 pieces of string that are 4 yards each. She uses 3 pieces that are each 3 feet long. How much string does Sophie have left?
*June 8, 2014*

**Physics**

. A rock is thrown up into the air with an initial velocity of 15m/s up. What is the rock's velocity after 0.40 seconds?
*June 8, 2014*

**Chemistry**

a) Which of the following reagents would oxidize Zn to Zn2 , but not Ag to Ag ? Answers are: Co2+ Ca2+ Br2- Br2 Co or Ca b) Which of the following reagents would oxidize Ag to Ag , but not Cl– to Cl2? Answers are: Co Br- Br2 Co2+ Ca2+ or Ca
*June 2, 2014*

**Geometry**

Need help solving this problem so confused The tries of an automobile have a diameter of 22 inches. If the wheels revolve ten times, how far does the automobile move? Round your answer to the nearest tenth of a foot and show your work
*May 29, 2014*

**Chemistry**

The mechanism for the reaction described by No2+CO--->CO2+NO is suggested to be (1)2NO2--->NO3+NO (2)NO3+CO--->NO2+CO2 Assuming that [NO3] is governed by steady-state conditions, derive the rate law for the production of CO2(g) and enter it in the space below. rate of...
*May 23, 2014*

**algebra**

i'm thinking of two numbers, x and y. The sum of 4x and 1 is y. The sum of y and twice x is 13. Find x and y.
*May 21, 2014*

**physics**

A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a 0.80cm diameter nozzle?
*May 20, 2014*

**algebra**

I have 8 cups of a juice drink consisdting of 25% oj and 75% apple juice. I want to make a mix with 40% oj. how many cups of oj must I add?
*May 19, 2014*

**Physics**

A yo-yo is spun from rest by pulling on the string with a constant tension of 2.0 N. The radius of the inner rod on which the string is strung round is 0.50 cm. The tension is applied for 5.0 seconds after which the yo-yo is observed to spin with an angular velocity of 15 rad/...
*May 18, 2014*

**MAT 201**

The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
*May 15, 2014*

**statistics**

The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
*May 15, 2014*

**Geometry**

How to foil 2xsquared - x - 15=0
*May 14, 2014*

**pre cal **

For a normal curve, what percentage of values falls beyond two standard deviations from the mean?
*May 12, 2014*

**Maths**

Find the exact value of cos^2(15°)-cos^2(30°)+cos^2(45°)-cos^2(60°)+cos^2(75°)
*May 9, 2014*

**Chemistry**

Nevermind I figured it out its: 2SO3^2- + 2H2O + 2e^- ---> S2O4^2- + 4OH^-
*May 4, 2014*

**Chemistry**

Is it: H2O + SO3^2- ---> SO4^2- +2H^+ + 3e^-
*May 4, 2014*

**Chemistry**

Balance the following equation for a half reaction that occurs in basic solution. Use e– as the symbol for an electron. SO3^2- ---> S2O4^2-
*May 4, 2014*

**Chemistry**

Thanks a lot i figured this one out too its: 2H2O + MnO2 + 3Cu^2+ ----> MnO4^- + 3Cu^+ + 4H^+
*May 4, 2014*

**Chemistry**

This is how I am doing it: 1. break up into half reactions MnO2--->MnO4 and Cu^2+ ---> Cu^+ 2. add H20, H+, and e- to both sides and I get: 2H2O + MnO2 ---> MnO4 + 4H + 8e^- and e^- + Cu^2+ ----> Cu^+ then adding them I get: 2H2O + MnO2 + Cu^2+ ---> MnO4 + Cu...
*May 4, 2014*

**Chemistry**

In a particular redox reaction, MnO2 is oxidized to MnO4– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. MnO2 + Cu^2+ ---> MnO4^- + Cu^+
*May 4, 2014*

**English Literature**

THANK YOU SO MUCH
*May 1, 2014*

**English Literature**

We have just finished reading Poe's "The Fall of the House of Usher" and I need to explain, in a paragraph what "Roderick is all mind in a weak body" means. I think it's somehere along the lines of his spirit being alive but his exterior being dead...
*May 1, 2014*

**chemistry**

if 7 moles O2 are used, houch energy is produced?
*April 30, 2014*

**french**

unscramble - qobusteiu
*April 29, 2014*

**Chemistry**

How do you calculate ΔSfus and ΔSvap for HCl given melting point,ΔHfus, boiling point, and ΔHvap also how do you determine the entropy change when 5.20 mol of HCl(l) freezes at atmospheric pressure.
*April 25, 2014*

**Chemistry**

The following equation represents the decomposition of a generic diatomic element in its standard state. (1/2)X2(g)--->X(g) Assume that the standard molar Gibbs energy of formation of X(g) is 5.45 kJ·mol–1 at 2000. K and –64.30 kJ·mol–1 at 3000...
*April 25, 2014*

**Chemistry**

Ok thanks a bunch!
*April 24, 2014*

**Chemistry**

how do you find lnQ?
*April 24, 2014*

**Chemistry**

For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 bar for all species. For the reaction C2H6(g)+H2(g)---->2CH4 the standard change in Gibbs free energy is ΔG° = -32.8 kJ/mol. What is ΔG for this reaction at 298 K when the ...
*April 24, 2014*

**Chemistry**

A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) +H2O (l) --->ADP(aq) +HPO4^2- for which ΔG°rxn = &#...
*April 24, 2014*

**math**

the drawing below measures 7.8 cm by 6.2 cm what is the perimeter in meters? scale 1cm=10m the drawing is square
*April 24, 2014*

**science 1 question**

ocean trenches are formed when the denser oceanic plate sinks
*April 23, 2014*

**health**

Sooo whats the answer????
*April 19, 2014*

**econ**

You want to determine the profit-maximizing production quantity for a monopolist. You can ask the firm's consultant to draw the firm's revenue and cost curves, but each curve would cost you $1,000. From the following list indicate which curves you will request and why...
*April 12, 2014*

**Macroeconomics**

I need help to answer this question? You want to determine the profit-maximizing production quantity for a monopolist. You can ask the firm's consultant to draw the firm's revenue and cost curves, but each curve would cost you $1,000. From the following list indicate ...
*April 12, 2014*

**Health**

A pound of butter since butter has more fat than lean meat does.
*April 3, 2014*

**Health**

Which would produce a greater number of Calories- a pound of lean meat or a pound of butter? Why is it so?
*April 3, 2014*

**Math**

The entrance hall to the Louvre Museum in Paris is a glass and metal pyramid with a surface area of approximately 1980 square on each side . The base of the pyramid is a square that is 35.4 meters on each side. What is the slant height of the pyramid ? Round to the nearest ...
*April 2, 2014*

**health**

So what is the answer???
*April 2, 2014*

**science(check answers)**

4 is C. and 5 is true.
*March 31, 2014*

**Algebra 1**

Hi! I'm doing my math homework, but I got confused. Can someone please help me how to solve simplest radical forms with an example? With square roots?
*March 20, 2014*

**Computers**

System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (e). 50 ...
*March 17, 2014*

**Calculusmath**

what is an equation of the conic section x^2+y^2=16 after a rotation of 45 degrees about the origin. A. (x')^2+(y')^2=16 B. (x')^2- (y')^2=16 C. (x')^2- 2x'y'+(y')^2=16 D. (x')^2+ 2x'y'+(y')^2=16
*March 12, 2014*

**science(check answers)**

b b d a
*March 11, 2014*

**chemistry**

Phosphoric acid is a triprotic acid, so H3PO4, H2PO4 -, and HPO4 2- are all acids. Which of the solutions below would have the lowest pH? 0.1 M NaH2PO4 0.1 M Na2HPO4 0.1 M Na3PO4
*March 10, 2014*

**World Geography**

If I were elected an official, I'd first of all be totally freaked out. That's because fifteen year old shouldn't be elected any type of office until their old enough to get a job. But second of all I'd try to fulfill whatever duty I was elected to do. I would...
*March 6, 2014*

**Physics**

A train 500 m long is moving on a straight track with a speed of 84.2 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.4 km/h. Assuming constant acceleration, determine how long the train blocked the crossing....
*March 5, 2014*

**Physics**

Does it take twice the work to stretch a spring 2cm from its equilibrium position as it does to stretch it 1cm from its equilibrium position?
*March 5, 2014*

**Science**

1.a 9.d 10.c
*March 5, 2014*

**math 4**

40 cm and 40 in
*March 3, 2014*

**computers**

1. It is important to include voice and point of view in writing because (1 point) A. It helps the reader understand the characters feelings and emotions B. It adds more words to the story C. It makes the information stand out D. It makes the story more important 2. A venn ...
*March 3, 2014*

**social studies**

do ur own homwurk
*February 23, 2014*

**ecology**

If you observe no changes in gene frequencies in a population over several generations, can you conclude that the population is not subject to natural selection?
*February 20, 2014*

**English**

If I wanted to search romanticism I would have done it, but I was hoping someone who already knows about it could help push me in the right direction/give me something to go on.
*February 20, 2014*

**English**

What was poetry like during the Romantic period? Discuss three characteristics of Romanticism. I'm looking for 1-2 sentences for the first question, and maybe 3-6 for the second question. Thank you so much to anyone who helps. Any help is appreciated. :)
*February 20, 2014*

**Chemistry**

A 150.0 mL sample of a 1.50 M solution of CuSO4 is mixed with a 150.0 mL sample of 3.00 M KOH in a coffee cup calorimeter. The temperature of both solutions and the calorimeter was 25.2°C before mixing and 31.3°C after mixing. The heat capacity of the calorimeter is 24...
*February 18, 2014*

**math**

A manufacturer produces a 4-cup and 8-cup coffee maker. The 4-cup maker takes 6 hours to produce and the 8-cup takes 9 hours. The manufacturer has at most 500 hours of labor per week. a. Write an inequality to represent the number of each type of coffee makers they can produce...
*February 17, 2014*

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