Saturday

February 25, 2017
Total # Posts: 3,209

**math**

convert y=2x^2+5x-5 into vertex form

*July 4, 2014*

**AP Macroeconomics**

nobody likes you :(

*July 3, 2014*

**physics**

The force applied to the bar is 34*9,8 = 333.2 N. The extension of the wire ∆L = 0.0145 m, so the bar stiffness is F/∆L = 2.30*10^4 N/m The number of atoms in one layer of cross section is area of the bar divided by the area of one atom =0.0012²/(2.84*10^-10)&...

*June 26, 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*

**Science**

I got a 93% because i listened to Queen Roaster it is A and D. please don't lie. now i don't have 100%

*June 4, 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*

**U.S History (PLEASE help!!!)**

b

*May 30, 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*

**geography**

B. 200,000

*May 26, 2014*

**Science--Myanswer Plz, plz**

The first one is vary Wrong

*May 23, 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**

Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper. Of all those who participated in the study, 80% received ...

*May 21, 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*

**Science**

The foreskin, a loose fold of skin that covers the penis is also called the ________. A. Spongiosum B. Androgen C. Prepuce D. Scrotum I think C 99% sure, but my book says its preouce, not prepuce. (Maybe it's a typo?)

*May 20, 2014*

**Science**

Thanks :)

*May 20, 2014*

**Science**

The filtered out word is org(a)sm. (Not sure why it's filtered out as it isn't a bad word......)

*May 20, 2014*

**Science**

The male sexual response includes erection and orgasm accompanied by ________. A. Ejaculation of semen B. Relaxation C. Restoration D. Stimulation I think it's B,but I also think it is A. Not sure which is the best choice.

*May 20, 2014*

**Math**

A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ...

*May 20, 2014*

**Algebra 2**

A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ...

*May 20, 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**

1.06L

*May 8, 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*

**Social Studies**

who i right?

*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*

**physics**

500 N

*April 10, 2014*

**physics help!**

a!!! It's A!

*April 10, 2014*

**physics**

3.3

*April 9, 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**

a certain object has a volume of 25.0 mL and a mass of 100 g. What is the density of the object

*March 31, 2014*

**science(check answers)**

4 is C. and 5 is true.

*March 31, 2014*

**educational technology**

Adb is correct 100%

*March 30, 2014*

**math**

I need help

*March 24, 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*

**Science**

i dont freaking know thats my answer

*March 16, 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**

150 + 50 x 17 = 1000 (1 km)

*March 4, 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*

**Finance**

940=34.5(PIVIFAr%,n)1,000(PVIFr%,n)

*February 25, 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*

**Wave**

Rebecca is wrong, but Henry is right.

*February 8, 2014*

**science**

1.What two things happen to particles in a substance when the substance is heated? 2. What are the three most common states of matter on Earth? 3. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? 4. A certain...

*February 8, 2014*

**math**

Oregon is about 400 miles from west to east, and 300 miles from north to south. If the image of Oregon on a map is 15 inches tall (form north to south), about how wide is the image of Oregon on the map?

*February 6, 2014*

**english**

F$UCK THIS F$UCKING TEST

*February 5, 2014*

**english**

There are 19 questions on the test now, they're's no way any of these are right now. I hate this Odysseus book

*February 5, 2014*

**english**

fable

*February 4, 2014*

**Help with science**

5 c 7 c

*February 3, 2014*

**physics**

ind the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×10^23kg), when Mars is at its closest to Earth (distance = 5.6×10^10m).

*February 2, 2014*