Sunday

April 20, 2014

April 20, 2014

Total # Posts: 1,498

**Algebra**

I'm factoring special cases and i cant figure this problem out: 45t^2-72t+24 please help

**Chemistry**

but do you have to do something special since its gauge?

**Chemistry**

the air in a steel belted tire is at a gauge pressure of 29.8 psi at a temperature of 20 degrees celsius. After the tire is driven out fast on a hot road, the temperature in the tire is 48 degrees celsius. What is the tires new gauge pressure. Can someone please explain this s...

**Science**

thanku!

**Science**

Helium gas in a balloon occupies 2.5 L at 300.0 K. The balloon is dipped into liquid nitrogen that is at a temperature of 80.0 k. What will the volume of the helium in the balloon at the lower temperature be? I got a weird answer like .66667 and i used charles law

**Math**

What is the ratio comparing the length in a drawing to the corresponding length of the object is called?

**Math**

On a die, the top and bottom numbers always add up to 7. What are the three pairs that each add up to?

**business math revised**

Bob makes his first $800 deposit into an IRA earning 7% compounded annually on the day he turns 27 and his last $800 deposit on the day he turns 35. (9 equal deposits in all.) With no additional deposits, the money in the IRA continues to earn 7% interest compounded annually u...

**business math**

Bob makes his first deposit into an IRA earning % compounded annually on the day he turns 27 and his last deposit on the day he turns 35. (9 equal deposits in all.) With no additional deposits, the money in the IRA continues to earn % interest compounded annually until Bob ret...

**math**

A fireman stood in the middle of a step ladder. He climbed down 4 steps and continued his work. He went down 8 more then back up 9 to the top. How many steps were on the ladder?

**spanish**

¿Cuál es la forma correcta del imperativo para tú? ¡_____ aquí! (venir) ¿Cuál es la forma correcta del verbo para el imperativo tú? ¡______ a las siete! (salir) ¿Cuál es el imperativo para la forma t&u...

**Physics**

An alpha particle and an antiproton are released from rest a great distance apart. They are oppositely charged so each accelerates toward the other. What are the speeds of the two particles when they are 2.5 nm apart? alpha particle has a charge of +2e and is four times as mas...

**Physics**

A 0.7 um-diameter droplet of oil, having a charge of +e, is suspended in midair between two horizontal plates of a parallel-plate capacitor. The upward electric force on the droplet is exactly balanced by the downward force of gravity. The oil has a density of 860 (kg/m^3), an...

**Physics**

A +3.0 nC charge is at x=0 cm and a -1.0 nC charge is at x=4 cm. At what point or points on the x-axis is the electric potential zero?

**Physics**

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 85.0 kg, and the hill is inclined at 19.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at ...

**Physics**

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 24.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 60.0 kg, and the coefficient of kinetic friction...

**Physics**

In the drawing, the weight of the block on the table is 430 N and that of the hanging block is 165 N. Ignore all frictional effects, and assuming the pulley to be massless. (a) Find the acceleration of the two blocks. (b) Find the tension in the cord.

**physics**

If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 3 h, a swimmer makes exactly 30 laps in a swimming pool that is 30 m long. Determine the distance the swimmer traveled, the total displacement of the swimmer, the swimm...

**physics**

A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.48 s for the tile to pass between two windowsills that are 3.0 m apart. How far is the sill of the upper window from the roof of the building?

**Research and Statistics**

I want to ensure I've done this problem correctly. Thanks! 3. In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78 12.45 One student...

**7th grade math**

i need help!!!!!!!! A=44 in.2, b1=13 in., b2=9 in.,h=?

**Chemistry**

A package of aluminum foil covers 75.0 ft^2 and weighs 12 oz. Aluminum has a density of 2.70 g/mL. What is the thickness of the foil in millimeters? (1 in = 2.54 cm, 1 oz = 28.4 g, 1 mL = 1 cm^3)

**Physics**

Three blocks rest on a frictionless, horizontal table (see figure below), with m1 = 8 kg and m3 = 20 kg. A horizontal force F = 101 N is applied to block 1, and the acceleration of all three blocks is found to be 3.5 m/s2. Find m2. What is the normal force between blocks 2 and 3?

**Physics**

Consider two masses m1 and m2 connected by a thin string. Assume the following values: m1 = 4.51 kg and m2 = 1.00 kg. Ignore friction and mass of the string.

**precalc**

Is sine an even or odd function?

**chemistry**

322.5

**trig**

the question is: given sec x = 4, tan x < 0, find sin(2x), cos(2x)and tan (2x)

**calculus**

Put the function P=15(1.1)^t in the form Pe^kt

**physics**

An animal-rescue plane due east at 50 meters per second drops a bale of hay from an altitude of 62 meters. The acceleration due to gravity is 9.81 meters per second squared. If the bale of hay weighs 191 newtons what is the momentum of the bale the moment it strikes the ground...

**german**

im in year 9 and i'm suppose to know lods in german but all i can remeber is guten tag and ich habe.... heeelpppppppppppp!!!!

**HISTORY**

That's not at all what I meant. I wanted someone to NOT write me an essay, but to answer my question. Don't even write me a paragraph. Just answer my question, please. Then I will post my essay on here, too.

**HISTORY**

Write a short paragraph that traces the rise of Japan from an isolated society to a major industrial and imperial power. I have to write an essay, so if you can write me a short paragraph that answers and summarizes my question, then I can write my essay. Thank you everyone at...

**Chemistry**

1. 98.9?

**stats help!**

What 2 numbers is the emperical rule of 95% between if the P of no shows is .10 and the average party size is 10

**algebra**

X(squared)+8X+2

**Math**

What number has 6 in tenths place,4 in the ones place,5 in the hundredths place,and 9 in the tens place?help me!

**math help!!!!**

Boo boo goo goo ha ha

**math help!!!!**

Boo boo goo goo ha ha

**math help!!!!**

Boo boo goo goo ha ha

**math**

Boo boo doo doo ha ha

**Algebra 1**

solve f(x)=3x+2 for x.

**english can someone check my answers**

Sonny and _me___ have been inducted into the National Honor Society I Me The guide showed the other tourists and __them____ where in the palace the Treaty of Versailles had been signed. They Them The experimental vaccine against the malaria parasites attacks them_____ at the ...

**Math**

Okay I have a scatterplot, so I have points on the graph. I need to use these points (without using regression on my TI-83) to discover a cubic function that would fit the data (as a sort of trend line). How do I go about this? I looked up the graphing form of the cubic functi...

**Algebra 1**

How do I simplify 5(-c+3a)-c(2c+1)? Show the work not just the answer so I actually get how to do it please.

**Algebra 1**

-y<36 What is y?

**Algebra 1**

5n-8 is < or = to 2n+10 What is n?

**Algebra 1**

-p/-7>-9 What is p? For solving inequalities.

**Algebra 1**

Let x be an integer. What is the product of twice the integer added to three times the next consecutive integer?

**english**

Which of the following is NOT a benefit that the narrator claims from his "modest proposal"? Question 9 answers A. national and international recognition for their efforts B. a sense of value and pride for poor people C. increase in profit and disposable income for ...

**english**

what are some facts about satire,lampoon,an d parody?

**spanish**

I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammer, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Tema 4 (un país hispanohablante) ¿Cuál...

**spanish**

I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammer, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 3 (Chicago) ¿Cómo es Chicago? el clima,...

**spanish**

I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammer, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 2 (el tiempo libre) ¿Cuáles son tus pas...

**spanish**

I am preparing for my oral exam (spanish 1) and i wrote all this down, can any one check my grammer, conjugations and add-on if necessary And also would this last me 3 minutes or should i write more to each question?? Theme 1 (Las vacaciones) ¿Adónde quieres ir d...

**Trigonometry**

The Chrysler Building casts a shadow approximately 130 feet long on the street when the Sun's rays form an 82.9 angle with the Earth. Approximately how tall is the building? Round you answer to four decimal places.

**Chemistry**

if metal A is placed in an ionic solution containing metal B ions and no reaction occurs, then metal B is most likely: A.) a halogen B.) higher on the activity series C.) not on the activity series D.) a catalyst

**Chemistry**

Calculate K at 25°C for the reactions given below. (a) Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s) (b) 2H2O2 2 H2O + O2 Given: H2O2 + 2 H+ + 2e- 2 H2O ° = 1.78 V O2 + 2 H+ + 2e- H2O2 ° = 0.68 V

**Calculus**

the integral from 0 to pi/2 of sin^5(x)cos^18(x)

**Calculus**

the integral of sin^3xcos^2x my answer is -(1/2)(cosx)^2+(1/4)(cosx)^4+c but this is incorrect, please help.

**Chemistry**

Calculate K at 25°C for the reactions given below. (a) Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s) (b) 2H2O2 2 H2O + O2 Given: H2O2 + 2 H+ + 2e- 2 H2O ° = 1.78 V O2 + 2 H+ + 2e- H2O2 ° = 0.68 V

**Genetics**

Quick question: which methods can be used to get DNA into cells? you can choose more than 1 answer A: Apply a high voltage B: Shoot DNA into the cells C: Infect with viruses D: Inject with a needle E: All of the above F: None of the above Is it all of the above? If so can anyo...

**Calculus**

Evaluate the integral: the integral of [5e^(2t)]/[1+4e^(2t)]dt. I have tried this problem so many ways and cannot come up with the correct answer :(

**Macroeconomics**

How would i approach this question? I don't necessarily want an answer. A "how to" would be better. (Simple Spending Multiplier) For each of the following values for the MPC, determine the size of the simple spending multiplier and the total change in real GDP de...

**math homework**

64/72--->8/9

**physics**

Atwood's Machine An Atwood's machine consists of two masses, and , connected by a string that passes over a pulley. If the pulley is a disk of radius and mass , find the acceleration of the masses.

**college physics**

A particular grinding wheel is a uniform solid disk of radius 8cm and mass 3kg. While the wheel is spinning at 50rad/s. A tool is pressed against its rim in a way that causes a friction force of 40N. If the disk is just "coasting" when the torque is applied, at what ...

**physics**

A hockey puck sliding on a frozen lake comes to rest after traveling 265 m. If its initial velocity is 4.2 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.

**probability!**

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that som...

**PROB**

Researchers at the University of Pennsylvania School of Medicine have determined that children under 2 years old who sleep with the lights on have a 36% chance of becoming myopic before they turn 16. Children who sleep in darkness have a 21% chance of becoming myopic before th...

**probability!**

so i am asked to find the prob of a male professor - given that he is promoted. and the stats are female promoted = 3% female not promoted - 12% male promoted 17% male not promoted - 68% and i just wrote down that it is 17% is this true? ALso, i looked up in my book that P(A I...

**physics**

A 56 cm diameter wheel accelerates uniformly about its center from 130 rpm to 400 rpm in 3.2 s. (a) Determine its angular acceleration. Express your answer using two significant figures. (b) Determine the radial component of the linear acceleration of a point on the edge of th...

**Physics**

A 1.80 kg block slides on a frictionless horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.0 cm before coming to rest. What is the force constant of the spring?

**math**

solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0

**math**

find the equation of a line that passes through the origin and point (-3,6)

**math**

about 7/10 of u.s. population in 1991 saying a to be true. What was the total popuation?

**3rd grade**

140,000

**Organic Chemistry**

What Happens when (z)-2-pentene reacts with Cl2 and H2o?

**Organic Chemistry**

What Happens when (z)-2-pentene reacts with Cl2 and H2o?

**Organic Chemistry**

What Happens when (z)-2-pentene reacts with Cl2 and H2o?

**PHYSICS ---HELP!**

The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

**physics**

Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two masses? Take the gravita...

**english**

Okay I figured out my question that I posted before. But can you please explain to me what this means? Style is not applied to writing. It is the writing. I don't understand what that means. Thank You

**English Ms. Sue**

I would like to know how I could write this in my own words. I wondering if you could help me out because I don't know what to put. Thank you and enjoy the rest of your weekend. Style is known for being the literary element that makes language memorable. Style is basically...

**english**

All four of them???

**english**

Are all these examples of Imagery. Yes or No.. Thank You for your help. I think that they all are. But not to sure. She smiled a little through her face was drawn with pain and she bit her lip the smile fading. We got there quite quickly even though it was still so dark and it...

**Organic Chemistry**

Determine bond length and bond strength? The picture of the problem is shown here: oi52[insert dot]tinypic[insert dot]com/jfgnb6[insert dot]jpg I got the following: I think that the strongest bond is the triple bond (A). I think that the shortest bond is also the triple bond (...

**chemistry**

2 solids samples each contain sulfer, oxyegen, and sodium only. These samples have the same color, melting point, density, and reaction with an aqueous barium solution. Are they solutions?

**Geography**

In simple terms can you please explain to me what free market capitalism means? All the definitions are confusing and I don't understand them. Thank you for your help.

**Geography**

Western civilization is characterized by the beliefs that the individual is in control of their environment and is responsible to improve it for themselves and family. Where do these beliefs come from?

**earth**

If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren

**Math**

How would you solve -9+x = x/8 -23 ?

**Math**

How do you solve 1/3x-6 = 9+2/3x Please help!

**Math**

Can you please explain what the quad formula is?

**Math**

-9+x = x/8 -23

**Science**

Make the necessary conversions between ordinary decimal form and standard exponential notation. a) 56934 = ?

**Literature**

In emphasizing the importance of individual thinking and basing one's beliefs on one's own experiences, Sujourner shows she has much in common with

**Statistics**

how do it on paper and pencil?

**Statistics**

The amt of time cold sufferes will experience symptoms is normally distributed wiht a mean of 7.5 days and a standard deviation of 1.2 days what proportion of sufferers will experience in LESS THAN 4 days , also what proportion will experience sympotms for 7-10 days How do you...

**social studies**

How many people lived on the north american continent before european settlement?

**science**

How many people lived on the north american continent before european settlement?

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